I remember reading somewhere that some of the Saudi pilots were literally too scared to fly the thing.
I think it more accurate (although Lightning Mate may have a different perspective) that the instructors had more difficulty convincing themselves that the Saudi students were capable of soloing.
And every Saudi 1st T55 solo was followed by a humungous party. They don't, of course, indulge in alcohol themselves; as one explained 'we are so religious that should alcohol touch our lips it immediately turns into water'.