Yes.
My son got an official dx of autism at 3, although, partly I believe because he was SO unco-operative and also delayed (with speech, walking). Autism and what I read didn't seem like a good 'fit'. I did acknowledge that he was not 100% NT but even before he had speech he was so communicative. A nod of his head, a point, a growl, a laugh, he successfully communicated everything he needed to and I never had the feeling that he didn't feel very connected to me.
I was reading article after article on line about autism and none sounded like him. The usual advice depressed me, reward charts etc. {sigh} It took me a long time to have the confidence to tell the multi disciplinary team that 'no, the problem is not my lack of consistency, the problem is this method is not RIGHT for him!''. I have given some of the people who've attempted to 'treat' him a book about PDAs. In some ways I feel lucky because he is not stereotypically autistic but in other ways it's hard because there is no help. I'm the expert. Nobody can help me because they know fuck all about PDA and I end up explaining it to them.
I still can't make him to co-operate/join in, for example, he never, ever does anything purely because the other kids are doing it, but if he chooses to join in, he participates with confidence, eye contact, creativity, imagination, empathy.................... So some 'friends' of mine decided he had Bold Brat Syndrome. I was told ''give him two weeks in my house and I'll sort him out!''.
Anyway, no official diagnosis of PDAS no, but I am certain that's what he has. I was venting on an parenting website years ago and a woman, a behaviour management therapist (?) told me to research PDAS to see if it was a good fit and it was. Bingo. Lightbulb moment.
I've had to explain what PDAS is to some people he's seen along the way now. We're getting ready for secondary school here and I know it won't be easy settling him in to a new secondary school.
To those with younger children with PDAS I would say that it gets a bit easier. NOw my son is 11 I can say things like well it's your choice and I don't mind but you can either go to this class or you can stay at home with the internet turned off, but I really don't mind, it's UP to you! Your choice. Then don't discuss it at all. YOu have to brazen it out and FAKE not giving a monkey's which choice he makes.