What difference does it make? Where you plotting to avoid the payment? Do you regularly fail to register your vehicles? You don't have to answer that, I will give you the benefit of the doubt and assume you always register your vehicles.
For me --- your skepticism is unwarranted. And you should have no doubts that Tesla will make right anything you can find that you don't like. They do. So, what's with the question whether anyone else has fronted their own registration payment? I wish they had done that for us.
You might want to think about how those of us with four digit VINs felt some sense of doubt when we first put up $5,000 for a deposit when we had only seen pictures of the Model S and had never seen one in person. Then were expected to transfer the money before we could even test drive one in our state. All history now.
Back just seven years ago when we picked up our cars, we had to find a safety inspection station that would perform the inspection on these "foreign cars" that they had never seen. Pay or sales tax in person. We had to convince the DMV that the car existed and it wasn't a golf cart or electric trailer just to get it registered. In those days the Tesla VINs were not showing up in the state DMV databases. The first owners registering their Teslas here - in Hawaii, before they could go to the DMV had to take their cars to the Dept of Vehicle Reconstruction for the specialists to eyeball it and certify it was not a homebuilt machine like a dune-buggy or sort.
To me, you should show gratitude to Tesla for going to the trouble to get your registration BEFORE delivery. There's dozens of threads here of people complaining having waited 30-60+ days for their registration and still waiting.
whew - sorry - got me started and I could not shut up!