Currently the biggest bone of contention is on mid-distance, 800m race, and the controversy didn't stem from how much differential there is between the best times, but because the
best three places in Rio 2016 were taken by 46XY "hyperadrenergic women".
Focusing on the magnitude of differences between best times is a red herring, and you fall into the troon brigade's numerical sophistry (A favorite argument of the likes of Rhys McKinnon is "why are you so concerned about the 1.6-sec difference between men and women when the difference between the first place and the last place in a typical women's race is 4 sec?"). The decision to ban troons from women's race should instead depend on whether we can establish a
statistical significance between the performances of the two sexes.