Eh, it can define work ethic but not so much intelligence. All of my teachers know I'm smart but I have like a 2.7, but I did get a 1940 on the SAT. It just depends on how you look at it, the valedictorians will always be intelligent but it doesn't necessarily mean they're going to be more successful over time. The public school system is pretty much bull**** anyway, any dumbass football player will get good grades in high school if they have the right teachers.