My son was evaluated by Child Find when he was 2 1/2 and the review panel highly suspected autism, although DH and I weren't ready to accept that label. We did agree to "developmental delay" and due to the severity of his "delays", we decided to enroll him in PAC at the suggestion of the Child Find panel. PAC was wonderful for him and he improved enough to enter a 1/2 day non-cat classroom. He is now in Kindergarten with an IEP for autism (Asperger's Syndrome) and spends most of the day in a regular classroom with some pull-out services.
In our experience, you don't necessarily have to agree to the diagnosis of autism to get services. I'm still not 100% sure what my son's condition should be called because he doesn't meet all of the criteria. He definitely is not typical, though. He is very bright, friendly, and outgoing - but extremely quirky. He marches to his own drummer.
DS is lucky that we didn't have to push to get services at all. In fact, we were initially offered so much more than we really thought necessary at the time, but we accepted all of the services that were offered. I'm so grateful now for everything we received.
In summary, I don't think the label really matters as much as how his traits impact his ability to function in an educational setting.