Huh, I was basing that on someone I know who recently completed a relevant college degree and is now working in the field of intellectual disabilities - the advice they received, both academic and professional is that "people with disabilities"/person centered language is the approach.

I had a look, the wikipedia page[1] indicates at least in the US that the American Medical Association, United Spinal Association and various federal and state bodies recommend it as best practice, but also points out various groups for deaf and blind people disagree.

[1]: https://en.wikipedia.org/wiki/People-first_language#Rational...