No, it's everything, a lot of them just don't try in the other subjects because they've been raised to give up and let men do it for them if something is hard or not fun. Look at any honors class and the girls are better, except for that one autistic genius, and among them the girls are also better. There's less of them, but they're almost always better, and good in a much larger variety of subjects. Nature just gave males the short end of the stick.