I said this before, but what really hasnt changed is the weekly numbers based on the evidence presented by NPD and others. Week after week the ratio of 360 to PS3 to Wii should be adjusted. I find it odd that after a NPD comes out and 360 is under tracked a touch and PS3 is overtracked by about 25% that the calculations for weekly NA numbers arent tweeked.
Its libraries that sell systems not a single game.