The kids I know who just happen to do well on tests love reading and have read all their lives, as soon as they could hold a book. That is why they didn't have to study or cram--these tests are NOT designed to do well with cramming any.
My friends isn't the type of person who reads all of his life. There are plenty of people like him. I didn't cram for these tests either. In fact, I spent several weeks, if not months, preparing for them. Don't try to assume anything.