[SamReidHughes]

> Women have an advantage up until a certain age (I think 12 or 14 y/o). Afterwards men crush them.

That matches my experience with math contests from 6th grade up through high school. Lots of girls were there in "24 Game" contests, but they disappeared. Another thing I noticed was that the relative ranking of boys moved around quite a bit. I had a couple of classmates that were quite competitive with each other in middle school -- but then starting in high school, one moved way up in the rankings, the other didn't. All I can say to explain it is, puberty activated something.