Indeed the Ps3's AR is large. The below method is, however, a bit... shoggy (I know! It's not even a word! Bloody...!)
Software in 08 vs current userbase (underlined is why it's shoggy)
Wii - 5.17M HW - 20.1M SW = 3.88 games pr console (in 08, and also a bit higher in reality)
Ps3 - 1.87M HW - 10.4M SW = 5.56 games pr console
X360 - 3.25M HW - 14.9M SW = 4.58 games pr console.
So that's a fair amount above the other consoles.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS