I'd also add that when a candidate does a PILAPT/COMPASS test they achieve the score that they are capable of - however, even if they had another go or more practise, theoretically they can only ever improve by one point. So in that regard, you either have 'it' or not.
And as scroggs said, if you're an arrogant tw*t then it's very difficult to hide - most people like that don't see anything wrong with themselves!
Also, I can take a joke, but, the CTC vs OAT slagging match is quite immature and unprofessional - and usually only continued by those who are either wanting to get on the courses or have been denied a place. I would have expected a cadet to rise above that kind of stuff. I know it's supposed to be a joke but there's no smoke without fire...