I don't think so. I mean, as far as I can tell I was never a teenager, or really a child. I haven't changed much. I've always been quite serious, pedantic. On the other hand, I've always loved stories and I play as much now as I did when I was a child. I was a serious child--now I'm a serious adult with many childlike traits.

I don't think you can say that autistic people are children who don't grow up, because we're not typical children. We just have our own developmental schedule, one that seems to vary from autistic to autistic as much as it varies from the typical range.