As in, if I believe that Steve Ballmer is lying about the iPhone being an overpriced product that won't sell, why should I believe him when he says that Windows Phone will sell millions of devices and that it's worth developing for?
I realize that nobody wants to admit that their competitors are making a good or better product than you, but I don't see why they wouldn't be willing to tell the truth.
Maybe it's a midwest thing, but if we assume that Jobs, Ballmer, and Rubin are all lying through their teeth, why would we ever buy their products? That is even dumber than believing they are telling the truth. The only thing dumber than trusting someone is buying from someone you don't trust.