Research has lead to the conclusion that the current categorization between Asperger Syndom, Kanner Syndrom (infantile Autism), Atypical Autism and High-functioning Autism is flawed. It might be beneficial to people with an AS diagnose, but not so much to some people with an HFA diagnose. There is actually no evidence supporting separate conditions. What first appears as Kanner Syndom can develop into HFA, which is indistinguishable from AS (apart from the language development history). So individually tailored treatment based on the current categorization is suboptimal compatred to the new model, based primary on two variables: intelligence and langauge development. Of course everyone who works professionally with this has to relearn (which I guess is the downside of all progress), but among professionals this change in DSM has been expected for a couple of years.