Hi T.,
My daughter has autism too. I know that when it comes to most things it is a lot more difficult. Children with developmental delays do take longer to do a number of things, potty training being one. I am sure it does not occur to him to tell you he has to potty because that is a social skill. Does he want to get out of his underwear really fast when he wets? For my daughter, I had to use reguular underwear or else she would not use the potty. She started using the potty at about two and a half and it took a very long time before she was completely done with potty diapers. We are still working on pooping in the potty. My daugheter is super smart and very high functioning and always requests a diaper to poop in. She has done this since three, she is now four and a half. Is he in early intervention? This is the very best way for them to get help! I love the ei. I hope all is well and if you ever want to talk or email, my email is ____@____.com... GOOD LUCK!