January is the only month I can remember that HW was really off, SW is better this month than I remember, the only game that was really far off was SSBB... I that is understandible, with such a huge launch it would be easy so be a bit off. I think Nintendo's fiscal will show that VGC has gotten very accurate.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut