I don't think that a young Beethoven's music lover is smarter than any other music fan. But I'm sure that the music is "young" or "old" like the brain of the listener. Perhaps that Mozart brain was "old" at 7 years (old) and he liked to compose merry melodies as survival reaction. To hear music is a brain exercise who evolves it musically like mathematics quiz evolve to smarter brain. Is'n it ??!!..