I think you also need to take into account how many Model S cars are making a cross-country journey at one time. I'd suspect it is less than 10 (how many people

I think you also need to take into account how many Model S cars are making a cross-country journey at one time. I'd suspect it is less than 10 (how many people drive from LA-NYC or vice-versa?). Strangely, this is a great example of not over-engineering and pre-selling the capabilities of your product. Tesla knows that the number of people who will make this cross-country journey is small. They are fairly certain that the stations can therefore handle the load. They are proving it is possible, and likely don't have to worry about people actually doing it.