Whoa! Grade A management consultant speak from Worldpilot there!
But the point is good - the instructor should be able to get the best progress from his/her student by motivating appropriately and by adjusting the teaching technique to suit the student's attitudes, abilities and objectives.
And best progress shouldn't mean (IMHO) getting the qualification as soon as possible - it should mean whatever is needed to help the student to be a safe and responsible pilot.