My dd is very nearly 7 and also just diagnosed with Asperger's. It's been a long time coming, and we have a lot of problems because of it, and being fobbed off over the years. I felt pure relief when we got our diagnosis, but that's because of our battle. I can imagine if you don't have the battles then it would feel different.
Personally we haven't told her that there is anything wrong/different with her. Tbh I suspect she thinks there might be, and she notices differences anyway because she also has Hypermobility. We haven't felt the need to tell her yet, but we aren't deliberately not telling her, if that makes any sense! It's just not been necessary.
We've got more meetings with the consultant clinical Pyschologist in March, so maybe it will come up then.
My hubby has also just been diagnosed with Aspergers too, so I'm struggling with being the odd one out and where this leaves me in all of it. There seems to be support for them having it, but I'm struggling to find support for me, dealing with the fall out of their issues?!
At school the only thing that is really apparent at the moment is the social side and the lack of awareness of natural social cues, ways things happen etc. we've been told to expect things to become more prevalent around 10/11/12 years old.