Here is a review of the progress of 200 children diagnosed with ASD.
www.playworks.cc/articles/200casechartreview.pdf
The section on why the "wait and see" (page 3) approach is wrong is so convincing that it has made me change my mind about that topic (a first?). (though I still stick to my own "brand" of therapy). Basically, he points out that there are pessimistic and incorrect assumptions about the potential of children with ASD underlying the "wait and see" approach. Grrr - wish I'd read this 18 months ago....
As an incorrigible optimist with a mildly affected child, I was also especially taken by the data on page 19. Eighteen of the children (the top performers) developed social skills that were significantly superior to those expected of their age.
This article is an appendix to "The Child with Special Needs" by the way.