I was just making that "A-DAR" stuff up, because a guy was claiming that 80 percent of the people here aren't AS.
I'm not sure a person can particularly spot AS, but I just made that up to screw with him because I was telling he was NOT AS if he couldn't spot them.
The thinking goes like this: it's hard to recognize AS. But for anyone to look at all these posts on WP and come to the conclusion that most of the people here aren't AS, he's either a genius of perception or he's clueless. My point was that he wasn't seeing AS in the posts here (just what he called a collection of "weird and strange" people), because he's clueless.
You can form the opinion that it's hard to recognize AS from the things people say about themselves, their relationships and their ideas.
You can form the opinion that you can't tell how many people here have AS or are just "weird and strange".
But IMO, you can't really have AS if you come here and form the opinion that most of the people here don't have AS (and you have significant experience with the NT world as he claims to have had).
There are certain cognitive experiences and thought units that AS people have, that aren't compatible with NT psychology, and vice versa. Some basic thought traits NTs have that AS don't, as a fundamental matter, and vice versa.
For example, it really bothers NTs to talk about certain social behaviors, like bullying, social aggression and (especially) the socially unfair behavior of NTs. That's why it's so hard to get friends and family to explain why some things are why they are or why someone said something. It bothers them to analyze their own social intuition on a concrete level because it induces social parallax (self-consciousness) and feelings of insecurity in them. Some NTs are almost incapable of dissecting social interaction because it makes them feel queasy and insecure. While you can see that here, it's not common. I mean, as soon as someone starts a thread analyzing or dissecting intricate details of NT social behavior, some people will freak out and spaz, saying it makes them ill and so on, to focus on NT social behavior. But I think that those NT-like people who get queasy and self-conscious whenever social dissection starts up in a thread, are a true minority (and maybe deluding themselves that they are AS).
As another example, the people I've seen here trying to form social cliques and condemn and sneer or belittle other AS people here (like saying who they think are the "okay" AS people and who are the "idiots") are also probably not AS themselves, because one might ask, Where does their social instinct for that kind of emotionally loaded interpersonal fixation on social worth come from? A fixation on social cliques, social acceptability, judgmentalism and worthiness is kind of alien to true AS mental landscapes. There are a couple of those kinds of people here and there, on WP, and I would question whether the "pecking order" belittlers and "this one's okay but that one's not okay" people are truly AS, too.
I think that some non-AS people just come here because they have some attraction for the thought processes and culture of those AS people that they approve of or think are cool in some fashion. And they're lonely, maybe.
To me, though, who have spent all of my life with NTs, in several walks of life and in various socio-economic settings, it perfectly obvious to me, that a lot of people here (most) are AS. The ones who are not DO kind of stick out, but because they display consistent patterns of interpersonal judgmentalism, verbal social aggression or they reveal their insecurity and distress when the AS people start micro-analyzing and dissecting NT social behavior.
So my answer is I was just making that "A-DAR" thing up (I make up a lot of catchy phrases). But, yes, you can tell who is AS or not, but mostly by occasional and subtle behaviors people display unintentionally. Not by something they "emit" like signals.