The sample menu is almost exactly what is presented aboard the ships. There are some occasional variations, but not much. Carnival is very programmed in just about every way. They announced a new culinary deal a while back, with a chef from London developing a new menu and training Carnival's chefs. I haven't heard a peep about it since the press release, so I don't know if they shelved it or what.
They use fancy names for the dishes, but it really isn't a complicated menu. Beef, chicken, shrimp, fish, lamb, pasta. And lobster tails on one night.
I have always been satisfied with Carnival's food, but I didn't start cruising with them until 2002.