I am a fan of preschool. I have two girls who are GT and they both started at two. Yes, they were a little bored and yes, they were much more mature than their friends. But, they learned new things - just by being in a new environment - they learned to trust other adults, they made friends, etc. It was a good experience for both and gave us lots of topics for conversation (how did you handle it when he pulled the toy out of your hand?) and it gave them confidence in the outside world.