That was my real experience and indeed is was a cadet position with one of the schools you've mentioned.
Before reaching phase 4 (the airline interview for cadet position) I passed all assessment phases which included a 1h interview with the school itself. That interview was very professional, as well as all the phases before that, so nothing negative to say about the school. As I said before , I did not expect at all the way the interview was conducted.
If other cadets participated in the phase 4 with this airline, please share your experience.