Why is there so much angst? I seriously don't understand why people even think there has been a delay. My account page says "estimated delivery" of March. It is still March. I still consider it possible, albeit unlikely, that my car will be delivered in March. If the car is delivered in April, I wouldn't consider that late, any more than I'd consider a food delivery at 7:15 late if the estimated delivery time was 7:00. The reason Tesla hasn't communicated anything is there is no change to report.
Using the current wait time for new buyers as the wait time for prior buyers is silly. The remaining wait time for someone who has been waiting in line is generally shorter than the wait time for someone who just entered the line. Moreover, the second person's total wait time might be longer than the first person's total wait time because the line got longer in the interim.