Females have higher IQ in almost all areas, but most never use it because they rarely have to in this society, so the results will never show it. Most women I know will flee at the first hint of a challenge, and often seem to fetishize their own daintiness. Men will do almost anything a woman wants without question, so there are no worries.

But if you look at the smartest of all...most of the elite are men, but the very top few are women; which tells me it's the few women who willingly put their talents to use who outperform all the men. What's more, almost all men can only be intelligent in very specific types of intelligence, whereas women are usually smart in all aspects.

I can personally say that I, and every boy I know of, lost a significant number of brain cells through puberty. I can no longer even begin to do most of the things I used to be super-talented at, and I don't figure things out as easily or think as clearly or learn as quickly. The girls did not experience this change.

It makes sense for a pre-civilized world. Think of the roles the sexes play in a hunter-gatherer society. All sexual dimorphism, both physical and mental, revolves around those roles.