Why do you think people who are L2/3 are nonspeaking?
That's not in the diagnostic criteria.
Here is the story as to how I got this idea.
So, back in the 1985, in Russia, my mom took me to a group for people with autism where they diagnosed me as autistic with the question mark (since they didn't have Asperger label, that wasn't the option, so they just put question mark next to autism diagnosis). Then, in 1995, in America, I was diagnosed with Asperger. Several years later (probably in 2000-s or 2010-s), I called the psychologist from that group in Russia and asked her why was I diagnosed as autistic if I knew how to speak. Her response was that they had "level system" in the diagnostic criteria that group uses, and the level I was diagnosed with actually matched what later became known as Asperger, so everything is consistent.
In any case, she then went to elaborate the level system they used. So their level system was different from the current one. For one thing, they had four levels rather than three. But, more importantly, it was going in the other direction. Level 1 was the most severe one and Level 4 was the mildest. She told me I was diagnosed with Level 3, and also that Asperger matches Level 3.
I was surprised as to why thats the case: Asperger is the mildest, so shouldn't it be Level 4? Her answer was that people with Level 3 have special interests while people with Level 4 don't. My first thought was "maybe Level 4 is something like social anxiety that is not part of the autism spectrum". But then when I read the link they had, they said that Level 4 corresponds to what is known as "high functioning autism". And then I remember one obscure website (American one, NOT theirs) that mentioned that special interests with Asperger are more pronounced than with high functioning autism. So maybe the logic of that group was to say that due to this "obscure" fact, Asperger should be Level 3 and high functioning autism Level 4.
In any case, the way she explained Levels 1 and 2 to me is that she said Level 1 is that kid I saw in high school (well, she doesn't know that kid -- it is American high school -- she only knew it from my description over the phone), while Level 2 is the Rainman. So the Rainman analogy comes from her.
Now, she haven't been talking about DSM 5 levels because during our conversation DSM 5 wasn't out yet. But, now that I know the DSM 5 levels, I can do the following logical reasoning:
Her Levels 3 and 4 would both be DSM 5 level 1
Her Level 1 would be DSM 5 level 3
So, by the method of exclusion, her Level 2 would have to be DSM 5 level 2
Since she told me that her Level 2 is Rainman, thats where I got that DSM 5 Level 2 is also Rainman.
By the way, I looked it up online, and found their classification of autism. Indeed, the "first group" is non-verbal, just like she told me. Unfortunately that link is in Russian, but you can use google translate to see what it says. Here it is:
Психологическая классификация детского аутизма
If they do happen to be nonspeaking, it doesn't mean they can't think or type.
You and I are having a digital conversation, not a verbal one.
But, at least in case of Rainman, the physical ability to speak wasn't the issue. But the content of what he was saying was. So, if Rainman could type, do you think he would be able to type more intelligently?
As far as non-verbal ones, I actually remember, back in 1997, when I was talking about that autistic kid on MGH Neurology Web Forum, someone told me about nonverbal autistic who, once got a keyboard, was able to type and the first thing he typed was how frustrated he was that everyone assumed he was stupid when he wasn't.
So I guess this does happen. I was just assuming it is quite rare.
This person was "rocking" and making sounds so you think they were L3?
Again, that was based on that conversation with Russian lady who said he is L1 by Russian criteria which would logically be L3 by DSM 5 criteria.
I don't rock but I have very odd mannerisms and I stim 24/7 even when asleep.
How do your stims look like?
And how does it look like when you stim in sleep?
I have echolalia as well, but it's not always present.
So what "forces" you to repeat stuff after others? Can you describe your inner experience when that happens?
How do you know that person wasn't intelligent or capable of having an "intelligent conversation" online?
I was asking questions to the staff lady that took care of him. And she told me that he saw things "in dots and spots" (I am not sure what that means) and also that he doesn't have concept of other people, and he doesn't even have concept of numbers.