I agree this is worthy of another thread. Couple quick thoughts though
This mode of thinking equates rank with skill and assumes that there is a "graduation" where training ceases. Someone who trains 3 to 4 times longer I would expect them to show a greater skill level regardless of rank. I also plan to practice as long as I'm able regardless of rank. The practice is it's own reward.
Although I am curious when,why and how the shift occurred.
It's only a guess, but I wouldn't be surprised if the hours per day trained have gone down.