I've now received CNF decisions on all of my schools: UPittsburgh, UMinnesota, UIowa, Louisiana State, and UArizona were all rejections...But! I was accepted at Ohio State (my top preference)! I am very excited. To everyone who is waiting on waitlists or a laundry list of rejections, just know that this was my third year of applying to schools and I received nothing but rejections my first two application cycles (not even a waitlist). Don't give up!
Also, if you've had a run of bad luck thus far, consider changing genres and looking at schools that embrace developing your talents outside that concentration. I submitted in fiction my first two years, but my professors convinced me to apply in CNF this year. It's not my favorite genre, but Ohio State has made it very clear that they encourage their students to take courses in whatever areas they like (many of the students are blending forms anyway). Lots of schools encourage this experimentation.
I hope as many of you stick with this ambition as is possible. Keep putting yourselves out there because fielding countless rejections is an inevitable part of the writer's life. I'm glad I wasn't accepted till now: I'm almost 32 and these delays have given me lots of time to hone my craft, gain life experience, develop discipline, and figure out what I really want to do with my education so that I don't waste it. Don't stop believing in yourself just because a handful of folks who read a small sample of your work didn't immediately glean your potential. And good luck!