OMG, this was a big issue during our recent trip, partly because of our large group size.
We waited several times, always between 1-3 hours. Yes, a bit ridiculous. The fastest was Ivans. Even when we were out in smaller groups it was over an hour. We didnt go to 3 dives this time but its always been a long wait there. It is one thin to get relaxed and on Jamaica time, but this trip was extreme for waiting times. It wasnt even just getting the food, it was getting menus, drinks, ordering, food, and yes forever to get the bills.