I always do it in under my required time but have to adjust speed as I go through it, works for me would like to get to stage where I'm just running flat out, that's my goal anyway.. Either way i will pass it..
9mph will result in ten minutes thirty if you run 1.5kmh. The limit would be 8.7mph I believe - but certainly aim higher than that. Although I haven't been yet, I doubt you would be able to finish your training if you wasn't fit enough to run it at around ten minutes.
it depends on how old you are. my max time is 11:38 and i ran on treadmill around same time as i run it out side at the time 10:44. always make sure you can run the time out side as well as inside cause PRNC is the only time you will ever run on a treadmill all the rest are outside expect bleep test which is done in Gym (Sports all). Only time i ever run on treadmill was 2 weeks before PRNC other then that its all outside.