i don't know if you're aware of this, but most people on the spectrum have the same intellectual capacity as you, and perhaps even better. autism is just a different way of thinking.
Autistic people can be smart, but can be cold and not nice to be around. That's on the antisocial spectrum. The rest are pretty much developmental disorders and will affect how you think, which is on the social spectrum. If a tard screams at you "HAI (YOUR NAME) CAN WE PLAY PLEEEASE!" then you can guess they're on the social spectrum.
High functioning is also a thing, but it barely affects you. OfficerZach still greatly shows his Asperger's for example, and nix tries to hide it. Many high functioning Asperger's children are attached to something, but not very strongly, which is why you can't detect it in most situations.
Let's not forget that diagnosing autism can be easy or hard. If you show clear signs of Asperger's then you can be diagnosed asap. If you show everything a normal boy shows, a doctor will 9/10 times say you are high functioning if your parents bothered to bring you to the doctor.