Not sure if there's anyway to know the answer to your Q... we'll just have to wait and see, but position for endless resilience by bears/shorts. They are determined, even if completely wrong, so they will have to be squeezed. I don't think they will "choose" to start to cover based on any sort of logic or factual observations.
My understanding is that Model 3 production has ramped to the point (2,000+ per week) that it'd take a tremendous effort on Tesla's part, and I think Tesla will choose to apply that level of effort into simply accelerating production rate to 5,000 by May/June and beyond in 3Q18, which would ensure all U.S. first day reservations who want LR + PUP and LR + AWD get the full credit. I'm not sure about SR, which seems to be more of an early 2019 story, but I think it'd be fair for LR buyers to get the full credit and SR to get half, and if SR buyers really want the full, they can go for a 75D Model S in 2Q/3Q18. I think that's a fair outcome. I don't think Tesla will bend out of shape to get $7,500 to people who only want to pay $35,000 for Model 3.
Correct, if SR is getting pushed to 2019(some thread is there on this ), no way they will get the full credits, it looks like ....