I'm fairly confident of at least a B. I'd be elated to have earned an A.
I also learned that I'm not near as good as "pulling it out" as I thought I was. Natural ability can only get you so far, then you just have to know the stuff. I put in several hours over several days studying for this test, but when it came down to it there were still a couple things that I didn't know I didn't know. And those were on the test :-)