The Official January 2010 NPD Thread (Data = 4 weeks ending Jan 30)

[jonop]

Lucas-Rio said:
Mass effect: overtracked by 100k
NSMBWii: undertracked by 100k
Wii Fit + undertracked by 150k
Mario Kart Wii undertracked by 200k
Darksiders overtracked by 150k

some of these differences are huge.

VGC is all America and canada NPD is just north America.

edit: oh I thought they all said overtracked. That doesn't explain the undertracked.