When DS was two, or nearly two, I said, "oh god, my kid is Rain Man" because he was walking around in a circle and counting -- and all the other stuff he did, like memorizing all the license plates in our apartment complex, etc.

When he was in preschool, they brought up Asperger's and I flatly denied it, saying, "why does there have to be something 'wrong' with him, why can't he just be a smart kid?"

It was one side or the other of second grade when we finally caved in on the diagnosis, as it became more pronounced and I studied it more and more.

But it's been really helpful to put the label on it and have that IEP to go with the ALP at school, and all the social groups and behavioral treatments that go with it. I hope you get what you're looking for, and that it's helpful!