I go to school in Amherst, Massachusetts, a rich college town.
This means three things:
A. It attracts eccentric parents with Aspie traits who are more likely to have eccentric kids.
B. It's rich, so parents with kids who need services unavailable at the local school send their kids to Amherst (I'm school of choice myself).
C. It's rich and has a lot of people who know about AS.
This means that there are about 4-5 students per class diagnosed with AS, starting with mine (last year's senior class only had one diagnosed.
Each class only has only one female diagnosed with AS. There's a girl in my Con Law class whose AS is blinding, yet has not been diagnosed. I'm guessing therefore, that there are probably actually about 6-8 students per class with AS (each class has a bit under 400 students).
I know all of the students with AS in my own class, two in the junior and freshman (er, excuse me ninth grader class, this bit of obsessive PC was mentioned on NPR) classes, and four in the sophomore class.
As such, I have a fairly good idea of AS based on myself and others.
I can tell you that there seems to me to be three main types of Asperger's.
The first type seems to have ADHD, very intensive personality, and I think these kids tend to be diagnosed with ADHD as well. A friend of mine in another district with AS is like this, as is one of the sophomore, and I've seen descriptions of others. This seems to be the rarest type.
The second type is very low functioning. One sophomore, my father (undiagnosed), and one of the teachers in the school all seem to have this. These people are completely oblivious to a social etiquette, not in the slightest self-aware, gullible, paranoid, hypocritical and condescending, clueless. (Examples: both the kid and my father will go for other people's food. They sometimes ask, but only while they're eating it. The teacher wrote a book of poetry and read the entire thing at the teacher talent show {about half an hour, everybody's least favorite part of the show}. Of course, these are just examples, other things at issue as well.)
Then the third type is by far the most common in my experience. Significantly higher functioning, I think that this is primarily because we're self-aware. Most of the kids in this type act very goth, and even those (such as myself) who don't are very cynical and observant of the world at large. We can break down over very petty things, and are highly disorganized, but when we're functioning we seem basically like very eccentric neurotypicals. We also while having AS can't lie (well, some can, but not convincingly), but we can be very tricky, and I've noticed kids in my study hall tend to give the SPED teachers the most difficulty by giving selective responses. I do somewhat wonder if the difference between us and the second type that I mentioned is that we've had treatment, or whether we're simply naturally more self-aware.
So basically there's the naive, clueless, and cynical, to give a very general breakdown. There are also a lot of paranoid by somewhat higher functioning people, not diagnosed, usually adults, who I hear experts say should have an AS diagnosis. This might make a third division.