<I then started worrying about what might have happened during those 26 miles>
all sorts of things. none of them good.
once it leaves the factory line, porsche doesn't care what happens. test drivers are plucked at random from un employment lines. they are encouraged to eat lunch while driving. after work they get to take the cars home and take their entire sweaty family out for a drive in the country. the aroma of garlic and body odor lingers for the first few months. if you are really lucky you can find a crumpet under the seat.
upon arrival at the dealership the salesmen take turns dropping the clutch at 7,500 rpm's. then they practice handbrake turns. use of the clutch when shifting gears is prohibited at all times.
my advice...buy a '89 volvo wagon and sleep at night.this is not the car for you