Production Reservation Numbers have been replaced by the Reservation Date
My P83 first disappeared like this:
Reserved
You will be contacted in order of your reservation to design your Model X.
and now has been replaced by this: (in white)
Reserved
Your Model X was reserved on 2/10/2012. You'll be invited to configure based on the date of your reservation.
2/10/2012 was day 2 of reservations, since people that went to the X Prototype Reveal in Hawthorne could reserve a Sig or Prod on 2/09/2012 if they brought their checkbook with them.
I guess this just means they will invite 2/09/2012 + X days to configure, first, then D days later invite 2/09/2012 + (X+1) + Y days to configure, etc. I don't think they want tens of thousands of us swamping not only their servers but the inside and outside sales staff with our configuration questions all at once. Finally, they will choose "D" and the number of additional reservation dates per group in such a way that all production reservation holders have been invited by 12/31/2015.