I prefer autistic. To me, "has autism" suggests disease. It's also a bit too close to this person-first thing, and I've never liked that. I accept that language is important, but I don't like to see it being policed too vigorously, which I think was being done by the lady in the story in the original post. I sometimes wonder how it is that some people think they get to decide what folks are allowed to say and what they're not.