Supporting Ben Goertzel's comment:

Michael Shermer revised his book, Why People Believe Weird Things, to contain a chapter called “Why Smart People Believe Weird Things”. In it, he quotes studies by Hudson, Getzels, and Jackson showing that “creativity and intelligence are relatively orthogonal (i.e., unrelated statistically) at high levels of intelligence. Intuitively, it seems like the more intelligent people are the more creative they will be. In fact, in almost any profession significantly affected by intelligence, once you are at a certain level among the population of practitioners (and that level appears to be an IQ score of about 125), there is no difference in intelligence between the most successful and the average in that profession. At that point other variables, independent of intelligence, take over, such as creativity, or achievement motivation and the drive to succeed.”