Interesting discussion going on over the last few pages. It seems that once again there are those out to bag the cadets at every opportunity they get. I agree with the comments that you get equally bad pilots from GA/Mil/cadets, and from all three you also get excellent pilots.
Now for a very big generalisation, and it doesn't apply in all cases. My experience in training candidates is that mostly the guys from a cadet background are willing to admit their lack of experience, and want to make up for it by absorbing information like sponges, trying to improve their knowledge and understanding of aviation. They are for the most part very hard working. The average GA (and even ex-regional airline) pilot that comes through the training programme has a bit of a chip on their shoulder. Some have 2-, 3-, 4000, sometimes 5000 hours and lacks basic knowledge in aviation. It makes teaching of more advanced theory concepts fairly difficult, which most ex-cadets seem to not struggle with too much.