Everyone with AS is different, so some people are going to watch a movie like Adam and think it’s a home run, and others will watch it and think the filmmakers are idiots who wouldn’t know Asperger’s from their as*holes. It’s a spectrum, after all, and ten different people will fall in ten different places on it. For me, I found it much more accurate than Mozart and the Whale. I’m not quite as clueless as Adam, but he’s very close to me. If I had never heard of Asperger’s before, watching the film would have been a revelation for me.
I didn’t come away feeling that the film was implying that people with AS are “too dumb to know what real love is, don't have any emotions,” just inept at expressing themselves, which is certainly true for me. As for the ending, it’s refreshing to see a romantic movie where the two leads ultimately don’t end up together under contrived circumstances for a formula ending.