Do I prefer to be alone/ in a small group most of the time? Hell yes! It's more exclusive and I get more work done. In a social situation, less people means more signal, less noise.
Do I sometimes completely avoid social situations? Of course! But it's solely due to the fact that sometimes, I just can't be arsed to care about dealing with someones trite problems.
When push comes to shove and I need to be social with large groups, there isn't an issue aside from the usual inherent "stage fright", but this is a quality that can affect anyone that doesn't spend the majority of their time as a public speaker.
Some of us exhibit the "qualities" in the article purely by choice, not by challenge. I'm pretty sure at some point in my youth, some poor misguided soul tried to diagnose me with some placement on the spectrum, but I would say that nowadays this incorrect classification is more common than not. Had someone told me every day that I was an autist, maybe I would have ended up exhibiting more of those behaviors simply by association. Maybe we should make a slight effort to stop telling schoolchildren that they're special or different, and more time letting people fend for themselves a bit first.