From what I understand, there are many children with autism who are having marked improvement on gluten-free diets. This is not saying that they have celiacs, just that the diet helps them. According to the Celiac Disease Center at Columbia University, 1 in 133 people in the US have Celiacs. At Autism Speaks they say that 1 in 150 people are diagnosed with that disease. I find the similarity in the stats interesting. Not drawing any conclusions or implying anything; I just find them interesting.