Between my 4th and 3rd kyu exams, I did 385 days of practice which was probably almost 500 hours. I still remember one of the examiners questioning whether it was true or not. I responded," If you don't like that amount, go ahead and cut it in half since it doesn't matter (I only needed 80 hours for the test)! He said, "Don't get smart with me young man! It's just that I thought his question was inappropriate as well.
I'm a black belt now but it still amazes me how little I have improved with all the practice and how much better all my instructors are. Maybe someday, I will feel differently but for now, I am resigned to being what I am and enjoying the ride.