I took college courses starting at 16, and my boyfriend was a grad student at 19. Honestly, he was sort of maladjusted, and I think he still is some 30 years later. I don't know how much of that was the academic experience and how much was him, though. I didn't have a problem, and I went to MIT for undergrad and grad school.
What does your son think about this? Maybe he would be better off writing video games for a couple of years between high school and college, or traveling, or something? I do think that the very selective schools would be just as hesitant to accept an 18-year-old grad student as a 14-year-old freshman.
