I share some of Rush's symptoms, but not all. If I hear a song some time after the beginning, even if I know it, I don't always pick it up immediately. It may take me until I get to a common refrain before I'll say, "Oh, duh - it's such-and-such." In contrast, I've bought plenty of songs on iTunes that I've never heard before. I lost my hearing in '84, but A Perfect Circle is one of my new faves. Depending on the stereo and speakers, I can hear individual strings buzzing as intended by the artist. If it's a crap stereo and speakers, I won't get as much from it. However, the bottom line is that, much like his opinions, Rush's experience does not provide a universal benchmark.