I think VGC PS3 numbers was undertracked as always. SONY estimated PS3 was sold WW 3.9M, so I think around 1.7M in US will be on the track.
as far as USA is concerned. Vgchartz has had 360 lower than NPD figures FAR more often than they had PS3 lower than NPD this year. PS3 was consistantly spot on or very close except last month.
Anyway I am more interested in the software order. There were a lot of big games released these holidays, so I'm wondering which one sold third best this month. Pretty clear COD and Just Dance will be 1/2