We are like Flyaway - lower scorers first, and the one expected to have the highest scores towards the end. This was never told to the kids or parents, but I caught on from reading this board a couple years ago. And my daughter caught on by the time she was 10. She often went last on bars, but was an earlier vaulter. She was so proud to be 2nd from last at state last year (glad she kept this to herself until we were home).
The exception is beam - coaches publicly say "falls are contagious" so they put a steady girl out first "to set the tone." I have seen a meet where every one of our girls fell off beam, all on a different skill, so the coach could have a point!