There are certain exercises that must be taught the same way and this is where the CAA should probably sort out a proper in depth syllabus, rather than just headlines.
However, there are others that different techniques can be taught to suit the student, but the basic principles should always be the same.
Mind you, the level of knowledge and understanding that I am detecting in the industry is absolutely gobsmacking. More than that, it's chuffing horrifying.
I was at an instructor seminar last week and some of the points that were raised had me shaking my head in disbelief.
As for the airbus where the tail fell off, that's due to control reversion. Something that few aircraft outside of the military (and even a fair few in it) cannot take. Full and rapid control deflection backwards and forwards puts massive strain on them. Not a very good long term survival strategy that.