I also go to a similiar school (Stuyvesant, it's in NYC, you might have heard of it) and I believe that the "smarter" girls fall for two things that average-intellect girls don't. First (and this is a generalization), most "smart" girls have been around more serious, AFC "smart" guys. This is what makes ****y+funny so much more effective on this type of girl. Secondly, because they are all crowded into a school such as yours (and mine) for "smarter" people, there are bound to be more "smart" guys too. And (this is another generalization) because these guys have more tendecies to be nice guys and AFCs, the girls look upon you much more highly.
Though it is much more easy to get a girl in the sack with a lower intellect because they are clueless and fall for just about everything, smart girls are easier to get and keep in that type of school's environment because of the reasons I've stated earlier.