As for the \link{http://www.mumsnet.com/Talk?topicid=1373&threadid=175289\Autism Every Day} thread, I see what you mean, Jimjams. I say things in front of my likely NT 2 year old that I probably shouldn't as well.
And I can see that the film is good at showing some of the behaviors that a parent of a young child with Autism needs to cope with every day.
But what the mom says is an extreme thing to say in front of her child, and it makes me sad for the girl if she understands anything, which is pretty hard to tell from the video. I think this is a great \link{http://www.halo-soma.org/learning_videos.php?sess_id=6472b2b147b022221947b7515dbee79d\video} to watch. This is a child with severe autism, who cannot talk and looks like he understands nothing, learning to communicate using simple choices and then a letter board. I'm surprised that RPM, featured on the same \link{http://www.halo-soma.org\web site} isn't getting good attention like RDI.
The \link{http://www.aut2communicate.com/Sydneys_Story.html\theory} is that some autism is largely a sensory processing problem having to do with the timing of signals in the brain, and that disruption in inputs and outputs can interaction through normal channels impossible, but that there are still channels to be found. It seems to have opened a line of communication with some \link{http://www.halo-soma.org/community_stories.php?sess_id=3c5cb95da8d45f99efecf2a0a737536b\kids} who didn't seem to be understanding, but actually were.