Well, here's the VGC SW for 2008.
Wii: 171.04M
Ps3: 79.14M
X360: 111.5M
So, if VGC was to be correct, the average units owned would be (for the AR to be equal)
Ps3 = 1
X360 = 1.4
Wii = 2.16
X360/Wii ratio: 1.56
Now, let's check this (just quickly, I'm not gonna bother doing it thoroughly)
Start of the year.
Ps3 = 1
X360 = 1.748
Wii = 2.12
X360/Wii ratio: 1.21
End of the year
Ps3 = 1
X360 = 1.39
Wii = 2.26
X360/Wii ratio = 1.61
Then claim that 50% of the total sold were in 2008 (it's roughly 50% for Ps3, 60% for Wii, 40% for X360), and you get
Ps3 = 1
X360 = 1.57
Wii = 2.19
X360/Wii ratio = 1.41
Now, the SW ratio again
Ps3 = 1
X360 = 1.4 = lower, would mean that X360 AR is smaller than the Ps3 AR in 2008.
Wii = 2.16 = The same, would mean Ps3 vs Wii ratio is pretty much identical in 2008.
X360/Wii ratio: 1.56 = Higher, would mean Wii ratio is higher than the X360 AR in 2008.
This isn't meant to be completely exact (heck, the way I'm doing it may give a very flawed result), and I'm not really trying to make a point (rather check the data).
Edit: I'm including Wii Sports.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS







