To be fair, I work in finance and the people who are successful are often pretty "stupid". (CAs, I am looking at you.) Whatever it is that an IQ test scores, it doesn't score for success in business or in "life".

In order for this not to be a useless post, FWIW: most mathematicians that I know and that are highly regarded would not do well in IQ tests, I would think. The clever ones solve problems and move on; the pioneers are less clever, more committed and more random, idiosyncratic.