He did mention that he has worked with some voice coaches over time if I am not mistaken (names escape me now). But I think it was more a case of self-discovery of his ability and then he progressed from there.
They did play one montage of vocal tracks that demonstrated his high ranges. Pretty impressive actually.
We came in from Toronto. He was skiing with his class at Blue Mountain the next AM so we stayed the night. It all worked out perfectly.