I'm not pursuing, but I've taken a few of the classes those kids take. It's not a terribly difficult major (as quantitative majors go), but it apparently does well to prepare you for the first few exams. I think it's the type of subject matter that just requires a certain amount of studying, rather than shear intellect. If you put in enough work, you can succeed. I would talk to Professor Curtis Huntington when you get to campus.