Is James Watson an idiot?

Normally, James Watson's recent racist comments are the sort of thing I'd ignore. However, Greg Laden has an analysis that raises an interesting question: Is James Watson an idiot? He's a Nobel Prize winner, won it for discovering the structure of DNA, a discovery which modern biology wouldn't be much of anywhere without, but... this might not be an indicator of talent: "Watson and his colleagues... were living in times when you could not swing a dead cat without discovering a fundemental property of nature."