I'll just mention in passing that I used to see PSA in California constantly turn round a 727-200 (about 160Y) in 15 minutes. They didn't do food but they did everything else. They used to get 5 or 6 round trips a day between LA and San Francisco out of each aircraft.
If the man whose job it was to marshal them in wasn't at their post (a Terminal 5 favourite for the stand guidance operator) whenever they came in then I'm sure the station manager would have been fired.