I did all my practice driving in a Grand Am. Probably 3 or 4 total hours of practice (they want 30 hours). When I actually took the driving test, I was not in the Grand Am, but an Escalade, with seat warmers and all that fanciful noise. I couldn't find the button/lever/pullstring/whatever that controls the parking brake, the plates were one month expired, and the gas pedal was touchy as ****. An Escalade is quite a bit bigger than a Grand Am, so parking and stopping at stop lines and crap were weird and difficult to coordinate. Luckily, the testing person couldn't find a spot big enough for an Escalade to parallel park, so I didn't have to do it. At one point I was doing 35 in a 25. I thought breaking the law was an instant fail, but I guess that's why I don't work there.
I passed, somehow, on the first try. Must have been the seat warmers. The lady's biggest complaint wasn't that I broke the law or had no feel for the size of the vehicle, but that when I checked my mirrors and crap (she acknowledged that I did check them), I apparently didn't turn my head enough for her tastes.