My prior belief was a soft match had you in a batch of cars, and then then VIN would magically get assigned to you - seemingly before transit. Now? All bets are off.
I do believe from my call yesterday that the VIN will get assigned when production is completed, the SA used the term "stamped" - I haven't looked closely at the S VIN but on every car I've had, I think the door panel is laser etched or stamped or something, and the dash seems to have some sort of riveted plate (but I can be mistaken)
I see no way to get that dash plate there unless there's either no windshield yet, or if it is inserted into the dash somehow - either before the dash is inserted, or slapped into the dash.
Either way, to me that means the VIN has to be inserted/installed BEFORE production is complete, but possibly not assigned until the car passes certain benchmarks.
unless they know they have a zillion of a certain set of colors/interiors, etc. going to a locale, i'd imagine they'd want to hard match the VIN to the purchaser, instead of building and shipping on spec and hoping there's enough demand for the combination of colors and wheels.
just my .02