In the show Through the Wormhole, with Morgan Freeman, Season 3, Episode 8 "Mysteries of the Subconscious"
They had a test where a group of people had to solve a problem by communicating with each other. They had accelerometers on their body to detect non verbal social interactions. With most people the subconscious part of the brain sends signals to the part of the brain that controls body movement. They can do this automatically with out thinking about it.
What if they did this test with a group of NTs and Aspies? It is my idea that if any of the aspies were using non verbal social communication, they would not be using their subconscious part of their brain. Instead, they may be using the visual, creative or memory part. Maybe an aspie has to remember certain gestures, and perform them on purpose. I would do this test.
Some people say, someone used to have Aspergers symptoms, but not anymore, thus throwing off a test on paper. My idea on that is, they are emulating NTs by copying behaviors, but when these behaviors are being performed, they are not using the same parts of the brain. The core of Aspergers is not what you can look like, but how you think.