http://vgchartz.com/hwcomps.php?reg1=America®2=America®3=America&start=39040&weekly=1
Ps3: 155K to 3866K= 3.711M increase
X360: 3475K to 10869K = 7.394M increase
I think that is a safe bet.
Wii has sold 8.8M in the time.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS