Maybe I'm mistaken, but I don't see how it can be 2-4 weeks. I believe there should've been around 60-80k SR reservations sitting around.
Napkin math:
455k total reservations as of 8/2017 minus 20% cancelled=364k. Say 50% is N.A. That's 182k.
I believe around 100k of these were delivered as of 12/2018(all LRs prior to Q3+ ~90% of Q3(Ps and non-AWDs were up for grabs w/o reservation) + 25% of Q4 deliveries.
So, ~82k outstanding remaining. Unknows are: How many of these canceled between 8/2017 and 3/2019. And how many new reservations were added between 8/2017 and 8/2018, when reservations were disabled.
Unlikely that any of these were ordering in Jan/Feb, since they should've gone for MR+$7.5k credit when they had the chance.
I'm thinking there was likely a net decrease due to cancellations, so maybe 70k.
These people have no excuse not to order, assuming they were saving up the last 3 years.
Unless some hardships etc.
So, say 60k. If these people ordered, it's 2 months of production. Considering that SR production is just "ramping up" and at least 50% will be LRs and MRs, I think that whomever has not ordered by now will not get the $3,750 credit.