MS: Xbox360 best selling console WW in 2011

[leo-j]

psrock said:

Baalzamon said:
While it may very well be true (we all know vgchartz isn't 100% accurate), how exactly does Microsoft know they sold more units than Sony or Nintendo? With the way I have always understood numbers, console makers only know the amount of units they have shipped, not the amount stores have sold.

Could somebody explain this to me/

They know, they would never make such a claim without knowing. Let it go, they won. 

They would.... and they have made predictions and claims like that.... out of thin air to generate hype, same goes with the other companies