Ha! Yes, that was incredibly rude of him! I'm afraid I would have responded rather rudely, myself. Something sarcastic like, "yes, isn't it amazing, since the rest of us are idiots?"

As mentioned above, what you CAN do and what you do are not the same thing -- reminds me of a friend of mine who had a PhD in psychology, and preferred to work at the 7-11. He said it was a great place to study people.