Edited. Thanks Fishy and Zen
VGC NA sales for first 19 months:
Wii - 64.3M
X360 - 38.6M (largely incomplete)
Ps3 - 33.8M
Minus 10% would be
Wii - 58M
X360 - 35M
Ps3 - 30M
As opposed to NPD, which has roughly this (your graph)
Wii - 55M
X360 - 33M
Ps3- 22M
So we are 5% above them on Wii, and 36% above them on Ps3. Their data isn't any more complete than ours considering X360. They don't count MGS bundles, so that could affect Ps3 a bit, still, I don't see how 36% is possible.
All of the above is roughly estimated.
Outlaw - this might be of interest to you - http://www.vgchartz.com/forum/thread.php?id=27550
It's my thread. It's a bit old, but some interesting info perhaps.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS







