Good read, but some of the comments are just downright appalling.
This section from TVTropes comes to mind:
Quote:
"High-functioning" can be used to claim that a person does not deserve assistance or should be capable of doing something which he may not in fact be able to do. It is also used by people trying to discredit autistic self-advocates, to state that "you are high-functioning; therefore you cannot know what it is like to be low-functioning; therefore you are not allowed to demand equal rights for all autistics." This is essentially a way of shutting up autistics: If you can talk, then you're too high-functioning to know what it's "really like"; if you can't, then others must speak for you; therefore, no autistic can ever speak for himself.