That's an excellent piece.
One thing I'd add (as a woman with PCOS): in the absence of PCOS mean testosterone levels for women are about 1 nmol/litre, rising to about 2.5 for women with PCOS. In contrast, men's levels are between 10 and 30 nmol/litre, and the lower male end of this range, 10 (until recently the target set for transwomen to get under) is 5 sigma above the female mean (incredibly unlikely). My understanding is that Semenya's levels were comfortably into the normal male range, thus to make parallels with women with PCOS is somewhat misleading. (I don't know what the expected levels in XX women with CAH are).