I know everyone who comes here expects to go to an Aspie Convention, and for there to be total harmony; yah, good luck with that happening.
NTs seem closer to it because it's in their "wiring"; it isn't in ours.
It basically winds up being awkward and uncomfortable as you have non-social people attempting to be social towards each other...which doesn't work.
In fact, just a few minutes ago, I thought of a great way to look at it:
take a Star Wars convention. Fans go there, tell each other why they love Boba Fett so much, and about their awesome action figure collections.
Chances are most of these folks have lots of things in common, in relation to said subject.
That's not the case at an Autistic Convention...and whatever folks do have in common seem to be discussed in far better depth on message forums.
Autistic folks are narrowly focus on their interests...it doesn't mean though that they'll have the same narrow interests that another Autistic person does.
For instance...for me, it's toys, economics, and history.
For the next guy, it could be antelopes, glass sculptures, and Amish horse-drawn carriages.
and so on and so forth.
And that's why it comes off so awkward.