Wowza, and I thought I was pretty special doing percentage calculations in my head. I even do decimals I can\'t believe he squared a 5-digit number in his head. That\'s insane.
But just because he can calculate things in his head doesn\'t mean he necessarily have a great analythical capacity. Just look at the Autistic savant-syndrome.
EDIT: but on the other hand.. his CV is quite long... lol