Update: I spoke to my DA today by making an appointment. Thanks to you folks who recommended that. He reassured me that he expects I'll get my VIN by the end of next week. He of course had no specific knowledge as to why my VIN is coming a little behind everyone in my cohort but offered some conjecture regarding the overall complexities of building a car. He said that every car's journey through the factory is different, and I certainly get that.
I very much appreciate the call, and I am cautiously optimistic. If it turns out I do indeed get my VIN by May 13, that will be 2 to 3 weeks behind the rest of my cohort. Will my car be delivered at the same time as my cohort or will that be similarly delayed? Time will tell, but if so, that would suck. Four years ago Tesla got me a Model 3 Performance about four weeks earlier than quoted because I was a repeat valued customer. I haven't forgotten.
I suggested if there turned out to be more significant delays perhaps we could talk about other options such as grabbing a cancelled car in another color or something. On that he was noncommittal. He did say for a faster and better experience that I should consider picking up my car from my delivery center (Scottsdale, 5 hrs away) rather than ship it to my house in Las Vegas. Seriously considering that.