I'm sure it's all relative to your perspective and your individual kids' needs. Where we came from in IL was a highly well regarded district for typical kids but getting them to give my kids OT or any kind of social skills support was like pulling teeth. In fact my oldest was receiving next to no services (only after I made a big fuss about his reading and writing delays) and made little gains in Kindergarten. We come here and they immediately gave him those supports as well as social skills supports. My current Kindergartener I was told in IL need no services whatsoever which would have been a giant problem had we not moved here as he needed the support of a self-contained classroom for part of the day to be able to handle his social anxiety. Granted my children are high functioning so it might be different for more effected kids but I had heard they had a good program for kids more completely on the spectrum.
In the end, you'll have to fight wherever you are but I do think Ardsley does a fairly good job of supporting kids on the spectrum. Here are links to other postings people has put up about their good experience there:
http://www.city-data.com/forum/westc...ct-autism.html