"I think the mild Aspergers have always been there. You see, Asperger's diagnosis did not become common in the U.S. until the early '90s. And an Aspergers has more or less normal speech development and they've always been here, that hasn't changed. I can think back to when I was in high school, this is 40 years ago, I could name kids in my high school class and college class that, today, would be diagnosed as Aspergers."