Jen, that sounds good. Those cancellation lists are often a lifesaver with these docs. You can also call back every once in a while (I'd do monthly) just to check for cancellations. Sometimes your doc can pull strings with one of these specialists to get your DS in sooner, but that's a rare event.
From now to January isn't a bad wait in the neuropsych world... however frustrating it may be for you in the meantime. You can use this time to compile a list of evidence and examples that you can present to the neuro about what you think the issues are. Specifics and documentation are always helpful to them. (Meltdowns are how many times a week, in what contexts? In what settings is the attention worst, and where is it best? And so forth, for every issue that concerns you.)
I also agree with what Masterofnone said-- be very frank and upfront with the tester about the issues you are concerned about, and keep their attention trained on those issues. This will determine what assessments they do and what goes into their report.
Our neuro gave us a 12+ page report on DS's quirks, positive and negative, with 2+ pages of specific recommendations for school. Don't leave the followup/feedback appointment post-testing without the promise of such a report and an understanding of what they plan to include in the report, making sure it addresses what you need addressed.
DeeDee
