Well for the RAF fitness test we only have to reach 9.10. The highest on IOT was 10.2, but they now use the mile and half at IOT, where you have to get under 10mins 30 secs if your male. You also have to 13 pressups in a minute and 30 sit ups (something like that) in two minutes.
The fitness test is important - if you are weak in one area but good in fitness, the higher score the better. However, a rounded individual is more suitable!
Good Luck!