I understand there will be differences, but having the PS3 dead last while NPD has it in second is a bit odd.
Maybe VGChartz('s?)...lol... method of gathering sales only works with consistent supply? If you have 2-3% of stores, yet a region or area you dont have a sample of has many less consoles than the sample area you do, its possible to overtrack right?
Supply issues makes it difficult for smaller samples to represent with high accuracy, because demand in one area doesnt have the supply to balance in another area.
Im not saying VGChartz is biased, but it seems lately there have been some issues when comparing to companies with a larger sample of the market as a whole. But it seems as of right now either NPD/Charttrack or VGChartz is not reliable.
