It has nothing to do with superiority. More girls are "average" than boys. More boys are "brilliant" than girls but also more are "dumb". It's about variance and distribution of intellect among each sex. A boy is more likely to be a genius or a dolt than a girl and a girl is more likely to be competent than a boy overall.

I find your sentiment interesting, but we can't ignore a fact in favor of not hurting people's feelings. Of course, more research is always being done, so I'm sure in a few years a new research paper will come out and we will hear a different facts about a certain gender's academic performance. Then next big paper comes out and the cycle repeats.

That's just my two cents anyways.