I'm chucking at your word choice. I also didn't find HP (which I love) until I was an adult, but that's because they weren't published until then!
Me either. I think I was 29 when I read the first one. It was 2001 or 2002. In fact, I saw the first movie on HBO before I ever read them. It was the movie that led me to the books. After that, it was on like Donkey Kong.