The Wii U will be sold at a loss

[TheShape31]

Soundwave said:
GameCube was sold a loss twice in its life cycle, once at launch (roughly $10-$20 loss/unit IIRC) and again when they dropped to $99 initially.

Proof of loss at launch?  Any links that quote reputable sources?

I only ask because this is the first I've ever heard of it.  And I've searched far and wide online in the past for factoids like that. 

Thanks.