ok, I'll bite.
I test pretty well, and I have been in several frameworks that tested me, so I know exactly where I fall on the bell curve.
there are several issues about intellegence and success
1. there is a window of "success" - people who are extremly intellegent usually aren't that successful, you have a lot of very successful people in their 130's and low 140's, above that it can be difficult to adapt to society. many, or most, of the people you think of as successful are probrably in their 120's.
2. there are many diffirent types of intellegence - I am lucky in that my intellegence is in an area that has been very helpful to me: it seems that I have an aptitude for understanding how people interact, for identifying patterns in social interactions and organizations. I have been able to leverage that in a sales managment career. on the other hand, my skill at putting together puzzles is probrably equal to an average 10 year old, because I have very weak skills in that area.
3. other traits can be as important, if not more so. if I were to say what contirbuted to my success, I would say equal parts intellegence and tenacity, probrably.