IIRC then this is somewhat the case, the bell curve for IQ points is "flatter" for men, there is more tendency to go into extremes, while women tend to have a tighter distribution.[1]

This does however not mean that there is a vast majority in either extreme, rather that if you look for the extreme ends of the spectrum, you will find that one sex is over-represented.

[1]: https://en.wikipedia.org/wiki/Sex_differences_in_intelligenc...