I have heard of it, however am not to familiar with it.

My son had Pervasive Developemental Disorder... which is aanother word for high functioning Autuism, or Autuism on the high end of the spectrum. And even that makes no real sense to me. But from what I have gathered Autuism has a whole spectrum of how it affects certain people. I think the same is of the one you are talking about.