Few notes:
1) Microsoft said that they sold 310,000 on Black Friday last year - US only
2) VGC includes numbers for Canada (7-8%) and Mexico (3-5%) along with US numbers
3) Microsoft "estimated" the 25% increase
So the question becomes:
What if the X360 actually increased more than 25% once everything was said & done?
What if the 310,000 didn't include weekly sales?
Depending on how one answers those 2 questions, you could get a number anywhere from 400,000 at the low end, to 500,000+ on the high end - well within what VGC has stated.
And for official numbers, lets use what's available, as per Microsoft's statements:
1. The X360 sold 310,000 on Black Friday in 2007...310,000
2. There was a 25% increase this year....387,500
3. There is another 12% increase for CAN and Mexico...434,000
So 434,000 would be a realilistic median for what Microsoft states that they sold during Black Friday.
Back from the dead, I'm afraid.