Autism?

Watched Wired Science tonight. There was a segment on facial expression recognition software and Autism. One of the characteristics of Autism patients is, they focus on the mouth instead of eyes during conversations. Thus missing the emotion of other people, which makes an impact on their social skills.

Wait a minute! That's what I've been doing all my life! It's only natural, right? The mouth moves, and you look at what's moving, right? I do admit, I'm somewhat socially challenged. (For those who disagree, You don't see the whole picture.) I always blame it on my English. Or is there actually something else???