Can ASD kids be successfully integrated into mainstream school?

[QueenEagle]

dh is convinced ds3 will struggle in mainstream education. I think with the right help in place he will be ok. Am I being naive?

He is 4 and currently at playgroup where he receives 4 hours per week of one-to-one with his keyworker.

He has poor toileting and self-help skills. How do schools deal with this?
He gets angry when things are not just how he likes them and can lash out unexpectedly.
He "closes down" if he doesn't want to listen or see something he doesn't like - ie he will curl up, covering his eyes and ears or hide away.
He has poor speech and refuses to speak in most situations (although this is improving slightly of late).

There is more but these are the main things he struggles with at home and playgroup. Am I burying my head in the sand about him staying in mainstream?

so much depends on the attitude of the teachersDS has had a teacher who had been teaching for 30 odd years but never had a child with autismto be honest she didn't know enough about ASD to recognize it anyway.a teacher who didn't have the foggiest about autism but knew everything about it, the very same teacher told me that she knew when DS was listening to her as he would be looking at her, i then had to explain that in fact if he was looking then he wasn't listening. another teacher who was newly qualified who said this is a learning curve and i want to learn, this years teacher has a son with AS so we don't have to go back to basics again. next years teacher will be fun, she has one arm and i just know it will be mentioned many times a day, he has already told me that he could beat her at playstation