It's a New Gender Gap: more and more it's girls who populate educational institutions. As the article says, "Girls are better able to deliver in terms of what modern society requires of people — paying attention, abiding by rules, being verbally competent, and dealing with interpersonal relationships in offices." To put it another way, men make systems and make them work, women make nice in a setting someone else has set up. If the world is mostly organized and administered top-down, girls will do better, at least among the general run of drudges (who in a top-down world will include most people). The tendency isn't likely to have much effect on the famous "glass ceiling" though.