Most MFA programs and college writing classes are put together by literary writers for the purpose of promtoting and generating literary work. I think genre writers are probably better off to find a good critique group or workshop that is geared specifically towards their genre.
I have found writing classes (and workshops, for that matter) to be both enlightening and frustrating. A novel, especially, is a tough thing to evaluate fairly in a writing class. Most of the writing classes I've taken were designed on the model of the short fiction workshop, which means if you bring an excerpt from a novel-in-progress to the table, it has to be pretty much a stand-alone piece. Somehow, even though readers are aware that the work is a novel-in-progress, they'll still expect your one small excerpt to have the complete arc of a short story, and are often prepared to blast your excerpt if it doesn't deliver. Unless you happen to have an episodic novel in which almost every chapter is a self-contained piece, this is often hard to do. Novels, especially larger ones, take time to develop. Writing class students are looking to find the development immediately, often expecting the full range of conflict, epiphany and climax within the first chapter. This isn't entirely their fault; it's what they've been taught by their professors and fellow students to look for.
The problem with most writing classes is that by their very nature, students are taught (or at least somehow seem to have gotten the idea) that it's all about jumping on the negative. College writing classes, especially, often degenerate into an ego-driven experience, with a lot of petty jealousies, nitpicking and clique-forming. Students often feel they are failing the instructor or that they will somehow look stupid if they aren't able to offer meaningful critique, which is often misconstrued as simply being able to identify everything that's wrong. Thus, they'll often go out of their way to look for the negative. It's all about getting the "A" for the class and impressing the instructor-not about helping the individual become a better writer.