Do people that practice or interested in classical music have high IQs?
Not necessarily, but they tend to have a better command of grammar and would probably phrase the question as: “Do people who practice or have an interest in classical music have high or higher IQ’s?”. The fact that you are studying opera means that you will have the advantage of learning to think in three or four languages-that does give you an edge intellectually. But, don’t forget, “musicians” often don’t include singers in the definition of musicians. Numerous opera houses have “musicians’ lounges” for the orchestral players, a chorus room for the singers in the chorus and a lounge area or private dressing rooms for the soloists.