Well, Smashman, that's your proof right there, in Nitsujdark's article.
EDIT:
Just read the article and: WAHAHAHAHA!
The best thing about the article was...well...all of it!
- losses of $900 Millions so far DO NOT include R&D of the XBox, marketing or the buying of studios by M$ *cough* Rare *cough*.
- losing $150-$150 on console sold, depsite use of cheap parts and cheap labour; price drops only mean more and more losses.
-can't afford to make any more price drops.
- if M$ loses too much that they can't pull themselves out, shareholders may demand M$ pull out of console business!
HAHAHAHA!
*wipes tears from eyes*