My experience with Aspergers comes from being a Mom. My son by the time he was in first grade spoke and wrote in three languages and told the teacher to give him some real work to do. That went over real big. By the time he was in 5th grade (note he had no clue what it was) he was doing calculas in his head. Now could he get along with the kids in the classroom NOPE. On a one to one basis could he carry on a conversation at the age of say 13 or 14 with say an attorney and the attorney stand there going and WHAT IS HIS AGE?!?!
At one point I identified a child at the school bus stop. I watched this child for a week, then for several days with the mother's permission I spoke to him several times. I questioned mom as to what type of testing the school has done which is a requirement in the US if requested by the parent. She stated they said he is just a behavior problem. I told her, tomorrow you be dressed ready to go to school once the bus pulls out here. We went to the school. When the principal saw me with her they instantly agreed to testing her son. Six weeks later a diagnosis of sever Aspergers.