I don't believe tall people are smarter than short people vice versa.
Because your appearance is nothing compared to intelligence, I mean I know a tall kid who's pretty smart, but over-all incompetent, and I'm the smartest person in my whole school and I'm short (average-sized, but everyone in my school are over-grown deformed people who think having loads of phobias and disorders are cool).
You can't just believe scientists because they're trust-worthy, not everything is right about them. It's more likely to be what decisions they make, by far, I am the only one who decided to educate my self at home as well as at school.