I don't believe that's the case at all. I believe Tesla is working as hard as they can to exponentially ramp Model 3 production - thus the limited choices for initial orders (all big battery, all RWD, all Premium Package, etc.). I believe they are building Model 3s right now with no regards to orders - build 250 Multi-Coat White (which get assigned the next 250 VINs), then build 200 Midnight Silver (which get assigned the next 200 VINs), then build 250 Black (which get the next 250 VINs), etc. while they continue to work out all the bugs with ramp up (building cars is hard).
Then they look at the orders and dole out the cars that fit the orders. Therefore if I had ordered a Black Model 3 my VIN might be 6,300 whereas another order on the same day for a White Model 3 might get VIN 5,600.
Mike