The issue I have is this: you can learn the techniques and have all the information in your head, but it takes a long time on the mat to really learn to put them into practice. It took me 1.5 years to get to blue, at about 7 1/2 hours a week in the gym, but that doesn't count the endless hours I drilled outside of the gym. My son trains with me, and is bigger and faster than I am, so I have a great training partner outside of the gym, and even then I had enough techniques for blue, but it took a long time to properly use them. Even though it took me 1.5 years, it was another year before I felt like I was really good at using them.