Some are still undiagnosed. It's one of those things that could bridge the gap between autistic and normal. I don't know how many are on the edge, like me. I suspect if the assessor had bothered to speak to me about my autistic traits, instead of asking me to draw pictures and tell her what flying frogs are doing, we might have drawn a different conclusion. But I don't know. I don't have the same difficulties as some people, but those HSP/autistic traits are hard to ignore. Certainly a lot of overlap if they're not the same thing.