This claim is so insane that it should really be met with outrage and a well thought-out response, particularly one which offers the author a chance to come to my house and judge for himself whether or not autism is just a fashionable outfit around here. However, because this idea is just so fucking laughable, I think that the only appropriate way to counter it, really, is with mockery.
Edit: Brandon left me the BEST comment and I had to change the picture to include it; it's the line underneath the title of the pic