It was proven long ago, that women have less genuises and retards, their perfomance is more mediocre and stable.
Is there any actual proof for this statement other than Codex Wisdom™?
From Wikipedia:
http://www.sciencedirect.com/science/article/pii/S0160289606001115?via=ihub
http://www.sciencedirect.com/science/article/pii/S0160289610000346?via=ihub
My impression was that this is a pretty well established fact, only less prevalent than people might think. Meaning that it effects the very end tails of the normal distributions and mostly not the general distribution. This of course has large consequences for the extremes of capability, in percentages of each gender but small effects on the
vast majority of people. (Meaning that unless you really are part of the top or bottom 1% it doesn't really mean anything)
It's like all the race/gender/sexuality/fucking-everything IQ tests - the SJW crowd cry Hitler at the mere mention of them, far-right and edge-lords take them as vindication, but in reality for 95% of population you'd need a truly insane difference in average ability (or spread of abilities) for it to translate into a meaningful difference in
individual abilities.
Even the greatest of IQ distinctions based on race/gender looks utterly insignificant when you overlay the difference in male/female physical strength/fitness. Then you factor in that an average 13-14 year old girl who trains 2-3 hrs per day at a club level in athletics/swimming will be faster than the average beer-bellied couch-potato adult male - that tells you just enormous a difference in average ability (and male/female physical aptitude difference is enormous) you need to translate into
any meaningful difference on an individual level.
The time when it all went mental, was when one scientist speculated that maybe slight differences in IQ - of the kind that are insignificant when dealing with individuals - might have real world impact when spread across the entirety of sub-Saharan Africa. A fairly harmless piece of speculation, as the very premise acknowledges that the differences at an individual level are too small to ever provide a basis for treating any one person differently. But again, people at both ends of the horseshoe spectrum went ballistic over it, and still do if you mention it.
I feel like you are misrepresenting or misunderstanding a few things here.
1. The physical sexual dimorphism in humans concerns strength, not "speed" or endurance (but there are differences there as well).
https://en.m.wikipedia.org/wiki/Sex_differences_in_human_physiology
Women are on average 50-60 as strong as men according to Wikipedia. That is not a slight difference. Thats the kind of insane difference you are talking about.
Regarding the study you mention it's not slight differences in measured IQ. It's massive. People in subsaharan Africa are testing on retardation levels in abstract reasoning. Whether one believes those tests are accurate is another matter, I guess.
en.m.wikipedia.org/wiki/Nations_and_intelligence
Subsaharan Africa tests between 65-75.
Regarding the distribution of intelligence I feel like the issue is twofold. People notice the very top of society, the 0.1%. The great scientists and the CEOs etc. These are overwhelmingly male, which would be expected given the previously mentioned distribution. The error people make is in the estimation of their own ability as well as a profound misunderstanding of statistical distribution. That almost all great scientists and CEOs etc are males says nothing about whether guys or gals are make better middle managers. The answers is that both probably suck.