This is a political statement, not a scientific one.

Larry Summers had solid grounds for what he said, but too many simply don't want to hear it - Political Correctness at close to its worst. I'm disappointed to see that Nancy Hopkins is still around and spreading her "magical thinking" about as a substitute for a more rigorous scientific attitude. But keep in mind that at MIT the Biology department serves the same function as the Women's Studies departments at other schools.

Another perfectly good theory for this trendy "girls excel at (fill in the blank)" is that we've spent the last thirty years turning all our schools into girls' schools, the profess surprise when we find that the boys are at best uninterested in, and at worst alienated by, their classes.