Of course they could still make up in March.
The numbers you quoted are from 31st January. They are not the current numbers the estimator uses. The current number is 10,463 deliveries in Q1. It was 12,200 on 31st January.
I'd say chances of S/X hitting 13k ... are very slim.
I disagree. I think they will exceed 13K US deliveries in Q1 and then again in Q2. If you have a better estimate let's see it. However, I recommend estimating global S/X deliveries or production instead of US so we can measure the accuracy.
Bloomberg puts Model 3 at around 6k (8697 - 2686).
Their current production estimate is 8,771 units. My current production estimate on March 3rd on the estimator is 9,050 units. See cell D1219
here. The difference is only 279 units. That's already as close as it gets.
Current totals as of end of Feb (from insideEVs) is ...
Imagine you are trying to decide whether I'm good at estimates or not. Let's assume at the end of October 2017, I estimate that Tesla delivered only 100 Model 3s during that month. Then the next month, I estimate 200 Model 3s. Then December passes and you say where is the December estimate and I say let's wait a little more. We wait a few more days and Tesla releases the Q4 delivery number which is 1,550 units. After that, I make a quick calculation 1,550 - 100 - 200= 1,250 and tell you that my December estimate is 1,250 units. What would you say?
You would probably tell me that I didn't make any estimates at all and I just low-balled the first two months and then waited for Tesla to release the actual number and matched that. That's exactly what happened in Q4 with insideEVs except instead of 100, 200, they estimated 145 in Oct and 345 in Nov and then waited for Tesla's number instead of releasing an estimate for December. Therefore you mentioning their monthly estimates has zero credibility in my eyes. Hopefully, they won't repeat the same thing at the end of Q1.