So, I noticed that the sales numbers for Americas hasn't been updated for Novemeber yet on this site. For example, NPD has the following numbers for November:
360 - 1.37M
PS3 - 530k
For the same time period (from Nov 1 - Nov 27) VGChartz currently shows:
360 -1,457,921
PS3 - 732,134
Why the difference? Does VGChartz count other countries in the America's total than NPD does?