kimck,
We are going the portfolio route. He has standardized testing scores through the Midwest Academic Talent Search that more than qualify him.
And...music is not his forte (no pun intended). Yes, he learns the theory quickly, but he kind of has a tin ear that has turned to...copper, maybe, over four years of lessons. But I still may go that route, thinking now about the theory learning. On the plus side, she knows he's capable. On the minus side, he has struggled to be polite and respectful in the face of a challenge -- as in, not liking to submit to correction until he's logically convinced that he's wrong, and sometimes not even then. MAJOR character issue that we're working on. But I think she recognizes that that's a symptom.
Anyway, thank you all again for your input; I feel more confident now.