I think there are many moderately gifted kids that work hard get perfect scores on the SATs. I know several years ago, a fellow I knew had his daughter retake the SAT after a prep course and she immensely improved her math scores.

Isn't that why they always review the tests and revamp? I always tell my kid that someone less smart can do better and be more successful if they do the work and she doesn't. Hilliary Clinton is a prime example of someone moderately gifted who works really, really hard. But makes a lot of stupid errors in judgement.