It sounds like a mild form of Asperger's Syndrome. I have AS myself, and I make eye contact most of the time, however my social skills are awful. I have several friends with AS, one of which has wonderful social skills and eye contact. If it were to be AS, it would be mild, but it still enough for him to be diagnosed.
Asperger's Syndrome can easily be mistaken for high intelligence, it took 14 years for a single person to think differently in my own case.
I could be wrong, I am far from a professional. Psychiatry is my own interest, but I am by no means licensed to diagnose your child. My advice is for you to talk to his psychologist about the possibility. She is by far a greater authority on the subject than I am.
