You are speaking from your vast experience Jane working, I presume, with adults and I'm speaking from my own in an education setting.
I'm not pearl clutching, but I know that if I used that terminology in the context of a school, it would be deemed to be unacceptable and I would be reprimanded.
In my career, working closely with pupils on the autistic spectrum disorder and joint support teams, including educational psychologists, I have never heard that term used, either by pupils, parents or professionals,
GN is for all to express their opinions, which I hope will be respected.