As it turns out the distribution of IQ in men and women is different[0][1][2][3], with men having more variation (more extremely dumb men and more extremely smart men), and an ever so slightly higher median (men have slightly higher IQ on average). These small differences lead to huge difference in representation of exceptionally smart people, because of how normal distribution works. These differences manifest themselves in tasks requiring high intelligence, such as chess, go, engineering and software development.
I say this as a scientific statement, with zero sexism implied. I believe that people should not be afraid to state scientific truths, no matter how controversial they may seem.
[0] http://www.sciencedirect.com/science/article/pii/S0160289606...
[1] http://www.sciencedirect.com/science/article/pii/S0191886911...
[2] http://www.sciencedirect.com/science/article/pii/S0160289606...
[3] http://www.sciencedirect.com/science/article/pii/S0160289604...