SuperTrouper wrote:
In the movie it says that he is "fairly high functioning," when the brother first meets him and the caretaker is explaining Rainman to the brother.
That's because of the fact that it was in the late 80s, when AS was practically unknown in North America and therefore there wasn't anything much more high-functioning than an autistic person who can merely speak. Didn't matter what they said; as long as they could speak, they were considered much more "high-functioning" than those who could not. Today, however, Raymond would be considered an autistic savant (like in the movie) but he isn't as high-functioning as someone such as, say, Daniel Tammet. (Tammet's case is one in a trillion, though.)