Before all this goes into a "I am better than Thou" contest.
I have taken C-172, 200 hour pilots to a Lear Jet and F-50 to F-100 transitions and other combinations.
Both processes were well documented by the Operators, the training was a lot of fun and bloddy hard work for both Instructor and Canditate.
"When the Student is ready the Instructor will appear" is and old proverb, there has to be a work together process, different in all combinations, the ability to wriggle through that process is the trick.
As seems to be noted above, not all people should be Instructors, it is an Art Form which not every one can do well. I think most of us have been "victims" of poor instruction processes, the worry is some pass this "skill" on to others in the food chain.
Some people can fly a 747 one morning and a Zlin in the afternoon, most of us can't and probably shouldn't even try.
Just do what you do safely, with care and consideration for both directions in the food chain, and look out for the B@#$ who are out to get you.
Stay safe, I might be on your flight