Gosh! Roseability, what a nightmare for you!
That NN sounds like a witch! She has handled this terribly. She needs to be repreimanded. Do not hesitate to report her to the local council (if it is a council nursery) and to the head of the nursery. She really needs to be taught a lesson in (a) handling sensitive information (b) jumping to crazy conclusions. Jesus.
As for your wee boy. He sounds lovely and normal to me. Not at all ADHD / autistic / Aspergers (even high functioning!). He actually sounds bright (but not, you know, Rain Man bright) to me. I wonder if the nursery nurse is not used to seeing such bright kids and has got the wrong end of the stick?
He sounds sociable and clever and pleasant and articulate. in fact, everything you would wish for in a son. Really. He does not sound as if anything is wrong at all. These days, these professionals are just so quick to label children. I mean, why? It's ridiculous. Your son sounds like he is bored at nursery and they don't quite know how to handle a child with a high IQ. POssibly.
So, just ignore her. I mean, I am not qualified or anything. But I have met two SN children in my life and your little boy sounds NOTHING like them. FFS. And whilst I am reassuring you based only on what I am reading on an internet thread, truly, just ignore her. Then report her. I have no idea what she jopes to achieve by these overblown accusations.
That should teach her to poke her nose into your son's business.
You do know your son best and you would do anything for him. Keep doing what you are doing! You are doing a great job. You don't sound like you would have a child with SN at all.
There, Roseability, I am guessing that's the kind of answer you were hoping for? Well, there you go.