How is it possible that girls perform better academically (in 2015) yet are under represented in the top tier of jobs? Either women have no interest in money, academic skills have no bearing in getting high paying jobs, or discrimination is more prevalent then you’d think. I suppose all three could be true.
So if by 2015 girls are performing better academically, then the expected time to see this in society would be 2035 or so. Just as with universal education, it starts to be available from the early 20th century, but it's not until post-war that large numbers of men from previously uneducated families start making it into the skilled workforce.
Our limited view at any given point is just a snapshot on eternity.