That's not surprising at all.  WRPGs have always done better than JRPGs in the US.  No JRPG has even cracked the 1 million mark in the US this gen.  While WRPGs like Fallout 3, Oblivion, and Fable have all crossed it easily.  One genre is growing in popularity in the US, the other is dying.  So to compare ME3 to FFXII is irrelevant.  As I recall, none of the exclusive 360 JRPGs have sold very well compared to their WRPGs counterparts.  So there's no reason to think that FFXIII would do better as a 360-exclusive, especially considering that the PS3 has a larger JRPG fanbase.

You also have to take into account that people who have both the 360 and PS3 probably bought FFXIII for the PS3.  I have a 360 and have all its exclusive JRPGs, but for FFXIII I chose to get it for the PS3.  

What does that have to do with this thread at all?

Japan has M.E.2s total sales beaten in 1 week.

Yes, but I tend to believe that the number of people that own both systems are in the minority of potential FFXIII purchasers.

This will never pass 4 million world wide lifetime.

That's possible.  I would be interested to see what percentage of gamers own both a 360 and a PS3.  

How do you figure?  It's already sold half of that in Japan.  You don't think it can sell 2 million in NA and EU combined?  

I've never seen a FF game launch with such little fanfare.

Sales are decent, though I admitedly would've been more impressed if it weren't split between two userbases.

Don't think this is gonna make it to 10 million at all folks. But we'll see.

No matter how you look at it, FF is a first day/week sales game. Will die off quickly.

Except that's wrong.  NO FF main series game has ever sold more than 50% of its lifetime sales in its first week, let alone first day.  Stop making $hit up.