Welcome to our forum.
I wish this was not true but I am sure others will agree that less than 5% actually wet test.
I'm always up for staying after closing to accomadate a wet test.
As for test driving a car, that's a joke. The dealer's I've been to take you around the block on a nicely paved street and don't dare mention a highway to see if the car can accelerate to 60 to flow into traffic.