I disagree for "mouth feel", but it's probably being overused and used badly. It is, however, an important element of the results of a recipe. If you're eating, say, a custard, and it has a gritty mouth feel, it's a failed custard!
I first found it in Sandra Boynton's book on chocolate, when she was discussing technical terms - I think this was related to "conching" the chocolate.
And it's not just texture, because the food can have texture right there on the plate, both the way it feels under your knife/fork/spoon, and how it looks.