One of the main things people seem to be saying is "I use this mastery all the time with my specific build on my specific champ, so it's higher tier". I wasn't clear that when I ranked these, I ranked them for EVERY build of EVERY champ. For example, if you're going to get points in utility, you ARE going to get awareness, regardless of who you use. If you go down that far, there is absolutely no reason not to take quickness. On the other hand, how many people are going to care about creep damage? One out of five assuming every team has a jungler in every game.
Basically if a mastery is higher tier, it means more people use it. That's all.