Booked mine the same day as well and in store (dunno if you did that at all sd or if you did it online). 'Clams is right on how they will do it, building the most expensive model and then moving on to the base. I guess it all really depends on how they are actually able to ramp up production, which is obviously dubious at best. If they are able to get to the "500k/year" pretty quick, let alone getting it to production, everyone who ordered so far (335k) will get all if not most of the credit, if only cause the tax credit doesn't stop right when 200k cars are made, there is like a quarter (or 2, so 3 or 6 months after the number is hit) that the full credit still applies, and then it goes to 50% for another 3-6 months, and then it totally goes away.
Basically you are near the top of Tesla's shipment if:
-Most Expensive Model (all options)
-West Coast/location based (Elon said West Coast customers would get first due to easier shipping and then move east)
-Time of deposit
-Deposit in store vs online (especially day of, Elon seemed to make a point that in store would get special gifts and priority, which they would get anyways since online didn't happen until much later that night)
My expectation is to get mine before my 30th birthday (Dec '18). I will get a few options but not all (my budget is ~40k and that number is solely based off of model s prices for options, so it will be different the question is how much), I'm in KC, and I got it about noon the day of in store. But who knows, while I love the idea and the cars, they have not hit a single deadline like ever, so deliveries starting late 2017" could easily be pushed starting "mid 2019" hopefully no on it being that long.