Most autistics are intelligent -- we just can't reach it, often.
I noted that IQ's in these children are for the most part normal. In my son's case, he refused to do the work. He's been in special ed for most of his school years.
I knew one autistic girl who was amazingly gifted at art. She could trace over any image and then reproduce that image from memory. She would just sit and draw for hours. It was fascinating. She loved singing and drawing for people. And sculpting. ^_^
Bingo!