But you have to remember that it can sometimes be at the Wii advantage:

http://www.vgchartz.com/games/game.php?id=23329 VS http://www.vgchartz.com/games/game.php?id=22952 and http://www.vgchartz.com/games/game.php?id=22951

http://www.vgchartz.com/games/game.php?id=12477 VS http://www.vgchartz.com/games/game.php?id=12539 and http://www.vgchartz.com/games/game.php?id=12568

http://www.vgchartz.com/games/game.php?id=23927 VS http://www.vgchartz.com/games/game.php?id=23929 and http://www.vgchartz.com/games/game.php?id=23930

1. Use graphs on the site that allows you to see tham all. (well 3 any way)

Though let me expand more what I said earleir. There comes a time and a place to compare things when tey are simlier.
Wii vs HD Invalid
Ps3 vs 360 is valid (most of the time)

Thing is Wii =/= HD

They are both targeting diffrent tastes. Also all the games you named up there all appeal to the wii's audiance more than
the HD twins or have a advantage that works.

In previous generation one console had over 50% of the market for hardware and software. This generation it's only in Japan.

When comparing one game that is on the HD to a different game on the wii that is one thing. But to compare a game that is the same on all three. Doesn't mean as much. If one console is getting much more sales than it's share of the market in hardware for a particular game compare that.

The comparison does not come from the fact that PS3 and 360 are HD and Wii isn't, it's just easier to say HD than PS3 and 360. It's just that PS3 and 360 have much superior hardware in terms on graphics and processing, so games made for these consoles cannot be properly ported to the Wii.

So when people compare the combined sales of games from the HD consoles vs the Wii ones it's because PS3 and 360 can have virtually the same games and are on the same market, not being the case with the Wii...

this

@OP, Carl, Khuutra

Buying habits are different between Japan, the Americas and Others on all three consoles.  I took the software sales in each region over the hardware sales in that region and found something rather interesting.  Per region, software sells to about the same % of customers in that region on the two HD consoles.  After doing this (used some popular 3rd party games, FF13, Halo, and MGS: 4), I have no problem lumping the software of the two together for EACH region.

Shooters

Based on the above, we statistically can say that the buying habits for Third Person Shooters are reasonably similar in all three regions.  We can also say that a higher % of American gamers on the 360 buy shooters than their counterparts on the PS3. 

We can also deduce from the highest selling exclusives (Halo3/MGS:4) that America bought a much larger % (per console) on the 360 than they did on the PS3.  Since Halo is an FPS and exclusive and MW2 was advertised as an Exclusive and is an FPS it is reasonable that it has a higher attachrate in the US.  BBC2 is an FPS so it should be much higher too right?  I would say that marketting (was marketted more towards PS3 or atleast I remember it that way) and the early Beta on PSN offset the 360 FPS pull.

Non Shooters: Assasins Creed 2, Fallout 3, GTA IV.

These are three very popular 3rd party games all from different genres on each system.  As you can see, the difference between each game in each region is very marginal (highest is 3.2% on GTA4 which easily falls without VGcharts Margin of error).  These games show that the PS3 crowd in EACH REGION is similar to that of the 360 in the SAME REGION.

Final Fantasy 13 (just cause its awesome)

What is interesting about Final Fantasy is Japan.  The attachrate for FF13 in Japan is VERY similar to the attachrate of Halo 3 in the US.  These two games define their systems in each of those regions.  Some might look at this data here and say that the PS3 sells more JRPGs.  I would completely disagree with that statement.  We have nothing to compare these numbers to.  We need a new JRPG (and a big one, HELLO KINDOM HEARTS 3) to be multiplat.  Once this happens we will see if this trend of more RPGs sold on the PS3 holds up.

Due to  the above numbers being so very similar, I will assume 3 things. 

1) Buying habits PER REGION are the same, regardless of which HD console IE (Europe 360 buys the same as Europe PS3)

2) There is no reason NOT to combine the two HD sales when comparing a game on them to a game on the Wii (which is notably different)

3) Americans LOVE Halo and Japan loves FF13 :)

(ALL FIGURES USED ARE FROM VGCHARTZ.  I used rounded Number such as: 7.07M MW2 360, 13.66M PS3 America, etc)

This took me a bit, so if you see a problem let me know so I can fix it.

Is that a fact?

I just laugh when people compare the sales of a game on both HD platforms to the sales of a game on the Wii.. Just shows how much Wii is dominating both consoles that their fans actually have to resort to COMBINING the sales of both platforms vs one.

I guarantee if you started combining 360 and Wii game sales against the PS3, suddenly PS3 game sales wouldn't look so great either..

Uh..Ok? I don't agree with everything Nintendo does nor 'defend' a company that doesn't pay my bills..Hell I don't defend a company that pays my bills lol. Call it what you will, spin, facts, I honestly don't care, dude. Of course I'm a fan of Nintendo, as I've said, just look at my avatar, but I'm no fanatic, I ain't taking no bullet for them (no offense Rol) But I try to call a spade a spade and that's all from my perspective.

That's the thing, we can be in a museum looking at the same work of art and see two totally different things, that's all there is to it.

Well, actually it is your fault, you were unable to convey why this thread is even remotely important. The only reason I bothered posting was because I'm tired of all this "the Wii gets put down all the time" bullshit. It's in the lead and as such amazes me that some people even think that it matters when it's compared to two technologically more advanced consoles which combined barely make the sales numbers of the Wii. Why do you care so much? What can you possibly gain by having people stop comparing the Wii phenomenon to the HD twins. If it's vindication...well then you my friend, lead a sad life where the only way you can feel good about your choice of console is by making sure nobody dares say anything bad about it.