It depends on the child. Some kids are naturally good with numbers, they like math and enjoy reading science books. I've seen such kids. If they have good teachers who won't kill their love of math and science, they will continue to excell in these subjects. Other kids naturally prefer art and music.
How well a student does depends on the actual kid. I think some kids excel in math and science but fall short elsewhere, but some students may do much better in art and band than math and science. Overall I think it is pretty balanced out to how each kid works.