This question has been asked numerous times over the years and there are always those who say they can thoroughly wash and dry a car, start to finish, in less than 30 mins. - some even stating they can do it in 15 mins. I have to call B.S on this! They're either doing a half-assed job or they're leaving parts unwashed, which actually falls under the first option.
To properly do all 4 wheels/tires - including the barrels, remove all the bugs and splatter on the front end - including the grille work, removing the tar, gum, etc., that's been slung up onto the lower portion of the car, wash inside the gas door, wash the mirrors, and then the main body of the car, there's no way this can be done in less than 30 mins.
I'm shocked when I pull it off in less than an hour!
I challenge anyone who says they can do a proper, complete wash and dry in less than 30 mins. to prove it by making a video and posting it.