[Tcoat]

Can it happen? Yes. Does it happen? Probably. Is it common? No.
People love their cars and think everybody else do as well. Keep in mind that the people moving these cars around during shipping do it hundreds of times a day. It is their job. If they screw up too often they lose that job so they take it easy on the cars. When you get a new car with 20 or so miles on it there simply is nothing that they could have done to hurt it in any way in the few minutes they drove it. Car are shipped with just enough fuel in the tank to make it through the shipping process. There isn’t enough to go on prolonged red line joy rides.
Don’t worry about what your new car has been through since it will be a boring mundane experience.
Never buy a demo car unless it is dirt cheap. Those poor things can be beat to hell very quickly.