The lazy/slow crews use the express menu and stop meal service at picayune, the really good crews start earlier do a full meal and have the diner completely cleaned and ready for the turnaround crews when they arrive in New Orleans. With the good crews you can finish your meal crossing lake Pontchartrain while gazing at the sunset across the water. It all depends on if the crew in question is worried about giving passengers a good experience or just existing to get a paycheck.
Honestly the worst dining crew I have ever had was on the Crescent. The chef cooked what he wanted before the meal started and just popped it in the microwave when ordered. Nothing was cooked to order and once what he had cooked was gone it disappeared off the menu for the rest of that meal. When it was all gone the diner closed. We were constantly told "we are out of ....." only for them to miraculously have it the next meal. The crew constantly told people "we restocked at ____ stop". Those of us who knew better said so and were told they no longer stock only at NYP and NOL but fully restock at every major station which was a load of BS. With all the effort they put into making things up they could have just done their job right to begin with.