I understand what you guys are saying, but I don't completely agree it's an ASD thing. Given context, I can lip read: for example, watching the local news. I know the kinds of things they put on local news, their facial expressions are exaggerated and 'stock', and you can watch their co-host if they have one. Context could simply be obvious gestures as well. If someone mouthed something at you and jerked their thumb in the direction of the door, what do you think they might be saying?
In loud clubs, I find great amusement by shouting (inaudibly) things to my friends where they think I'm contributing to the conversation, but I'm actually just shouting similar sounding but very different meaning words. I'm not sure if they've caught on yet...