I've had SR bats from Laver, which have performed better than some G2 and G1 bats I've had, but I guess I could say the same about other lower graded bats I have experienced. I think that grading on performance is a little misleading, I think that perhaps if there is an extra special bat that isn't a grade 1, then you should put it in a performance grade, but only if there are very few of them. It's basically an easy way to sell G3 bats for G1/2 prices, . I think that you should sell the bats in the grades you buy them as in cleft form, and maybe have G1/2/3 model, then a premium model, which is the very best one or two G1 clefts from a selection of 20 or something. If a bat isn't up to the performance that a G1 should have, then downgrade it. If it performs better than a G3, then keep it as a grade three, or if it is a VERY special one, then put it in a performance grade, which has a price point in between a G1 and G2. (Again, the performance grade has to be very limited in quantity)
Of course, this is my thinking, and I have no clue as to how the bat making industry is run. I only know what I'm told, and that may not be true, and I can only guess as to how much profit there is in bat making. Maybe some bat makers are having to sell more performance graded bats because they wouldn't earn enough without that kind of advertising.