Reworded: "I'm so blown away by what I'm experiencing that it's hard for me to believe it's even humanly possible, what you're doing."
I can't imagine anyone taking this as an insult. If that person exists, I hope I never end up in the unfortunate situation of paying them an incredible compliment.
Reworded: "I'm so blown away by what I'm experiencing that I think there's a very real possibility that you don't deserve full credit for this achievement."
If you're ever in the position to give someone a hyper-superlative complement, you could simply use one of the many hundreds of constructions that don't involve doubting the skill of the recipient.
Calm down mate, I'm merely disagreeing with you. I do understand your point, and I do think that your interpretation makes for a reasonable hypothesis, but it's my opinion that it's less plausible given the exact wording originally provided.
I wasn't saying it wouldn't be received as a complement, after all, it's just as likely that it was offered in all sincerity. I'm just saying that the literal implication could be construed as an insult.
I would not think so. My impression is many artists (musicians too) feel inspired by a higher spirit, so to speak. Personally, I am not a believer, but I understand how it can feel when one is.
Which is kind of an insult to Yo Yo Ma.