Sorry Kevin, but I'm not going to use up my test time to send in something that won't do me any good right then. I learned a long time ago that the most precious commodity during a test is time, and there is never enough.
I'm always glad to assist when I can, but not at the expense of my exam score. If I could highlight a question, and go back to it after the test to comment on it, I would. By the end of the test I've probably forgotten the intracacies of the question - I'd need the exact question.
I'm sure it's because of the test format that CWNP doesn't control, but I think you probably miss a lot of feedback people would give otherwise.