It troubles me when exhaustive study is done on a subject by people qualified to do so and it gets tossed aside as made up because it doesn't jive with what we were taught when we were young. One may decide not to believe in it, but slighting the effort of the people trying to open lines of discussions in an effort for everyone to understand the game better seems counter-intuitive and, in fairness, insulting to the people. History is filled with things we were sure we knew was right or wrong only to be proven other-wise. Technology helps. And it's good to know the some of the same people who consider Perez's framing is below average also, overall, had him as the best defensive catcher last year. One can point out a flaw in a player and still, overall, think he's very good.