Mass Effect sales better than reported! VGChartz got it wrong?

[loadedstatement]

Wow. This is a big name guy commenting on VGChartz. I find that much more interesting than VGChartz actually being slightly off in their numbers.

I wonder if ioi or whoever collects this information is working on getting more retailers involved in the sample.  I think it would make things more accurate.  Then again, I dont have much knowledge on the whole process.  It may not be that easy.