That only really shows a general strong positive correlation between some measures of intelligence and some measures of success. It doesn't really say anything about if small fluctuations in the extremely high end of intelligence has a noticeable effect.
We're assuming that men dominate the tails of the intelligence distribution. So the real question is, does being in the top 1-2 percentile make you much more likely to succeed in so called high-status positions compared to 'only' being in the top 5-7 percentile.
