A general family practice doctor that is not a surgeon has no real excuse and is just rude. 20-30 minutes is about it for me, especially if I was on time, had an appointment, etc.
Yes, I know emergencies come up, but if it is a regular practice, then it's time to find another doctor.
I had an internist that practiced at KW medical center and his staff actually told me, after an almost 2 hour wait, that his wife (SAHM) wouldn't let him leave home until she had all the kids (too young for school) fed and dressed. I was furious, ripped him a new one for being such a pu##y and never went back. Told him if you are so habitually late every day that your staff rats you out to patients, then you need to grow a pair, hire wifey-poo some help and get your happy *** to work. 4951