I was potty trained sometime after my 3rd birthday, and the same was true with my niece, but she's definitely NT. Then again, my parents believed in waiting until the kid was ready before starting potty training, and my brother was the same way about my niece. As for my own development, it was slightly delayed, but once I started talking, you couldn't get me to shut up. I was reading full sentences by the time I was in kindergarten, so I basically went to mainstream schools and in regular classes. I did go to preschool at a school for special needs students, but it was obvious I was too high functioning to continue there.