They do? Judging by million sellers only.
Wii: 61.5M/21M=2.92/14months=0.209
Ps3: 12.6/9.6=1.3/12months(due to Europe) = 0.109
X360: 68/17=4/26?months=0.153.
I know, this isn't a totally fair comparison.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS