Ah yes, delivery dates.
These seem to be quite elusive to predict or confirm.
Mine has certainly changed quite a bit from the original Mid-November estimate...
Like you, I have been told that they are putting the 60 kWh batteries into production in early Dec and that the first cars should be done by the end of December. This would put my relatively low P # early in the 60 kWh wave of deliveries and I was told to expect that to be the very end of Dec - Mid January as most realistic, with mid February being an absolute worst case scenario of everything conceivable goes wrong.
For me this was an issue because I have a car that I need to get rid of and Mid Nov was reasonable without repairs, mid January is not, and I don't want to pay for expensive maintenance or repairs on a car I am selling 1-2 months later, but I also don't want to drive a car in need of repairs. Luckily, I can borrow an In-Law's car for a month and bridge the gap for now. It is hard to plan around a delivery that keeps changing dates.
Having said that, I'm not complaining. I'm pretty psyched that 3.5 years ago I made the decision to put down a deposit on the best car in the world. Just ask Motor Trend, Automobile Mag, Yahoo Autos, Popular Science, Popular Mechanics, and Time for some confirmation on that topic. I'm sure there will be more praise to come and after you get the car all this wait will have been worth it.
I'll let the forum know when I get mine.
Cheers.