I'm not sure when I first heard about autism. Probably either late childhood or as a preteen. I do know that what I learned was just about the severe, nonverbal type. I actually remember when I first heard about Asperger's, though. I was about 16. My special interest in neuropsych disorders had already started, and I was still trying to figure out what was wrong with me. The previous year, I was researching OCD for fun, to learn more about it, and that's when I discovered that I had been struggling with OCD my whole life. But I didn't get officially diagnosed with OCD until I was 17. So, at the point in time of this anecdote, I still wasn't convinced that OCD was really what I had, since I hadn't had a doctor/professional confirm it.
Anyway, I remember that I was staying overnight at my grandparents' house, and after they had gone to bed, I was reading an issue of Good Housekeeping that my grandmother had. They had an article about Asperger's in it. This would have been around 2003 or 2004. I read it, and the only thing that resonated with me was the special interests. But this article focused on a kid who had severe Asperger's and the stereotypical symptoms, like having deep fat fryers or vacuum cleaners as his special interest. So, after reading it, I really didn't think that this explained me, and I didn't give another thought to my having Asperger's until my CBT therapist I saw my freshman year in college suspected it.