Rich, who has spent any money on purely investigating the properties of willow other than GM. You were there when they revealed a small part of what they know. Grains are just a factor, of course you could get a 35 grain bat to be dead and a 3 grain bat to pee all over it but my argument would be that more grains equals extra stiffness and more energy returned.
If you disagree then please give me your counter argument, what would you say was best and why? Give me the science behind 9 grains.
Maybe something worth bearing in mind is that finding plenty of tight grains is hard to do. And when I look at Pro bats I see plenty, maybe not 30 but near 20 often, very rarely low numbers.