To add to the above, my understanding is that classifying autism spectrum disorders into subcategories (eg aspergers) didn't seem to provide much benefit and

To add to the above, my understanding is that classifying autism spectrum disorders into subcategories (eg aspergers) didn't seem to provide much benefit and it made things more difficult to understand. At this point all of our limited interventions are similar and are focused on strengthening social skills, which applies whether you have aspergers or pervasive developmental disorder. This may change again if we find benefit in subclassification (e.g. a treatment that benefits aspergers patients only).