hahahahah that story from the cellist is awesome. I totally buy it. I think classical music type people see rock as like I can do this in my sleep and they totally can haha I'd imagine both of those folks you mentioned are probably formally trained?
I've thought alot about multi-instrumentalism, specifically my question is..... if I spend a shitload of time trying to learn piano lets say.... will it make me a better guitarist? Fortunately, I am about to spend about 10 hours with someone who plays keys, guitar, bass and trumpet super good and I'm planning to ask him just that. I don't know if I'll be able to totally relate to his answer b/c he's music degree'd from UofM and stuff so it might just be like "cool story, check out this chromatic scale I can't play cleanly" haha