Cuban Sandwich

I had a delicious Cuban sandwich the other day, and it occurred to me that fastfood hamburgers, specifically McDonald's, have more in common flavorwise with Cuban sandwiches than with "traditional" American hamburgers. They're thin, with crusty white bread and most of the flavor comes from a tangy, vinegary sauce and pickles. I wonder if, even though McDonald's makes its bank by selling the idea of middle-American comfort food, it knows it's biggest consumer base is actually Hispanic, black and Caribbean.