My experience has been like Devilishpyjamas - everyone at his school has had no problems getting PIP or DLA, the children who have ASD and have been turned down tend to be at mainstream schools and more capable of independent living skills, most of them have GCSEs and A levels and are heading for university, and don't have much intervention with specialist consultants
My son also attended a special school and had major continence problems and non verbal etc. Unable to attempt any qualifications and have independent living skills. He was on DLA higher rates for both, and indefinately. Your post is interesting, I wonder if some of the reason my son does not qualify is when you are at school there are so many professionals involved in your care. However, once my son (and his brothers) became 18, and obviously no longer at school, there were no more professionals. He is now 26 and not seen anyone medically or educationally for many years now. There is no ASD clinic or professional in our area, so there would be no one who knows him well enough to give any report. Anyway, thanks for your interesting post socksville and glad you managed to get what you and your son deserve without too much difficulty.