I hear complaints, jokes, and crazy comments about my turboprop (BE-1900) all day long. That said, I still think that the top priority for most passengers is not safety, comfort, or noise level...they want the cheapest ticket. If it takes scads of turboprops to do such a thing, then the passengers will adapt. Also, having non-revved on the Q400 numerous times, I have never heard a passenger complaint, FWIW.