Respectfully, I've spent a _great deal of time_ with elementary school teachers, and many appear very very willing to diagnose random children, adults, and coworkers as being "a bit autistic", and so on.
In addition, and assuming wildly here, how old is she? If you're the HN average of about 30, and she's about your age, she doesn't really have a cross-generational experience to pull from, even assuming she was making observations free of the very many cognitive biases one would expect in this situation.
My bet would be that if you found a teacher -- from almost any point in history -- and asked them what the kids are like in their time period, they'd tell you about the latest inventions that have made their kids uniquely awful and anti-social. I'll spare you pulling out the 3,000 year-old quotes about how "young people these days don't respect their elders".
If there are some studies that show it, I'd be all for it. Teacher anecdotes are uniquely poor quality samples, in my opinion.