I've seen the 6th part also now.
I have to admit I have not seen anything that rules out AS. Yes, they act like teens... but they are teens, aren't they. She seems lucky to be able to have made friends... but remember they come from different societies, and we are told she doesn't tend to be able to keep relationships. Also, the whole thing with walking away might be lack of social reciprocation rather than diliberately being rude... she did apologise about it.
When I've attended a social group for Adult Autistics, there are some there who seem like normal people to me, and seem to be able to make friends. Also there are some there more affected than I am. Its a spectrum, some milder and some more seriously affected

I personally wouldn't like to doubt anybody's DX based upon a documentary like that.
Mind you, I've only watched parts 1 and 6... parental responsibilities prevent more today.