I can't comment on 'reverse culture shock', but can say that in England, each time I go for a routine check-up at the dentist I have to wait 30-45 minutues and sometimes an hour. It infuriates me (as I have to arrange time off work specially to take these appointments and make up the time out of my leisure time ¬_¬) but if I walk out, a new appointment can't be scheduled for a couple or several months.