I didn't have any medical experience going into NS, and neither did over half of my class. The ones that did are finding Fundamentals a little easier as far as skills and clinicals go, but from what I've read that advantage dissipates once you're past this semester. Remember that people use this website to vent - how often do you come home, after having had a very normal day, went to school, everyone was nice to you,you did fine on your exam - and do you then go immediately to a website to talk to complete strangers about it? Probably not. A few of us post great experiences every so often, but not a lot of people post average or OK ones - not because they don't happen to a lot of nursing students every day, but because people don't feel the need to sign on and write about them.
My experience: I have none in the medical field, but a ton in the service industry - I know how to get along with people. I also have a lot of college experience behind me, so I know how to study and I have good test-taking skills. My unique experiences have prepared me for nursing school in their own way, and I happen to be getting all As so far. That may change, I still have 3.5 semesters to go out of 5, but you don't need MEDICAL experience to do well. If you get discouraged before you ever start, you're setting yourself up for failure - I went in, studied my rear end off, and strove for an A on every exam. So far I've met that goal, but even if that doesn't continue each semester it's what I know I'll go for each time.