You're counting the total sold of the titles released in the holdiay season, rather than the actual software sold during that season. That's a rather odd way to do it, and it gives an immensely flawed result.
If you're really interested in checking the data, you should look at the overall software sold, not just the "top 5 titles".
Take the Wii. Look at the top 5 LT. They total out 73.5M.
For the X360, they merely total out 34.9M
Does that mean that the Wii has sold over twice as much software? No, of course not - it's barely sold 30% more.
So really, measuring success by only the top selling is completely flawed. It serves for little more than faking proof.
Now, look at the total software in the holiday season. That's far more interesting.
Wii: 68.5M
DS: 62M
X360: 44.6M
Ps3: 28M
PsP: 11M (lacking data though)
That gives a far more precise and correct view.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS
