One of the things about social intelligence that people don't realize is that it is not always connected to regular intelligence. I've seen examples of this in real lie as I have seen people with aspergers who I can tell are "more intelligent" than I am. Although I feel these people show intellectual abilities, they don't always understand socially on the level that I do. I get in a conversation with them and they don't seem to notice social cues in the conversation.
This shows something that autism is not a simple thing, everyone is affected differently and at different levels.