If that were true, it wouldn't require a Big Government mandate from the likes of Gray-out Davis and our Gov. Vil(e)sack.
Perhaps you believe there is no resistance on the parts of conventional power producers and grid operators to allow Wind power to muscle out their produce. Given a choice and at the same prices, sometimes even for a penny more, a hugh percent of the people will opt for renewable energy over conventional. This is a series problem if you are joe nuke or coal or union pacific or gas or enron or in some other way in bed with conventional power. The PTC and the mandates are necessary to get people to do the right thing.