I'm afraid not -- it was just an anecdote circulating around the astro department at Princeton. Feynman was known to have an IQ of 125, and I met a grad student there who admitted to an IQ of around 80 -- a perfectly bright person, to be sure. Again, I don't have the ability to prove these things to you, but I think we should recognize that, occasionally, our methods for measuring intelligence are very very broken.