How did we go from all kids that has Down syndrome being the ones with autism to every normal kid having autism???

I came across a post from another subreddit. This individual posted two pictures of her boys— they literally look like normal kids. This individual claims they have autism (maybe they do, not saying they don’t). So, I thought about my childhood— I am only 33.

When I was in school, it seemed like anybody with Down syndrome was "autistic"— over the course of of 15 years, it seems like every kid out there has "autism" and not to mention, seems like every kid out there is in the "gifted" program…

Is it me or are these parents being fully deceived (either themselves or by somebody) that their kid is mental?