Well they don't actually. They get the ATPL theory which is mainly jet stuff.
And the CPL is a progress check with an in house checker. Then they move onto twin IR.
There are a few good ones, but they have most of the time had exposure to aviation before doing the course. And you get the occassional one that gets the fact that the way they they have been taught to fly a single isn't the normal way of doing it, and basically bin what they have been taught and ask loads of questions and learn on the job.