I took the national medic on Friday before the long weekend. Stopped at 85. I was so sure I failed, I didn't even bother looking at the results until last night. But I passed.
I'm already a MA medic and I'm trying to move to another state so getting the national is the next step. I've been out of class for around 3 years so I hit the books hard and used various resources (Brady website, Munden, a few different iPhone apps) to take an estimated 2000 multiple choice questions. I then used those resources to shed light on my weaknesses and re-read those chapters in the book. And then took the questions again and again until I was constantly getting between 80-100%.
But this test was hard. There were multiple questions on things that I really didn't study... just some weird, left-field stuff that you never really go over in class. And I really feel like they make up medical terminology to throw you off... I'm big on process of elimination to help guide me if I don't know an answer, but it was tough.
I think that if you finish the test thinking you failed, thinking it was the hardest test you've ever taken, you probably did alright. The test gets progressively harder as you answer the easy questions, so if all of your questions are crap you've never even heard of and you just want to stand up and leave, you're probably killing it. If you finish thinking you knew every answer and all the questions were easy, that's when you're in trouble.