I'm on my way out but I want to take the time to address this point (I'll get to the others later). From birth, women are segregated from men in nearly all forms of physical competition - and the boys receive the better part of the investment in time, training, resources, etc. So it's not surprising whatsoever. This same consequence is actually true to within men competition as children are segregated by age. I'll get the citations to you later. Malcolm Gladwell has a good basic coverage of this effect in one of his books (I forget which).
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