Hell, I'd even go so far as to say it might not be worth a specific categorization, that everyone is a bit different and we don't need to pigeonhole every state of reasonably normal into little categories. Ever since Asperger's was popularized, we had a big chunk of people that are not especially far from normal latching onto this.

If it doesn't need particularly special treatment/accommodation, then it's not really worth a category. If someone feels like not dealing with people, needing a bit of a break from it, then that shouldn't need to be correlated to a condition. By the same token, it can't be an excuse for being unreasonable to others when you are perfectly capable of being reasonable, you just don't like doing so. If you misread someone's non-verbal cues, whether or not you have a "condition", people should understand that's just a possibility of everyday life.