I worked for Wayne for well over a decade and I’ve known Kellen since he was 12. I only trust one of the two lol.I have seen this too.
With a stiffer vane, you will have less flutter, making the arrow shoot flatter. Is it night and day difference? No, but at 50 and further you will have less drop.
Wayne from the Bow Rack (and Kellen from Inside Out Precision) posted about this not too long ago as well...so if you don't trust us, you can trust him. The Bully vanes from Easton (made by Bohning now) have the same shape, but the material is a lot stiffer.
Less flutter = less drag = flatter trajectory
Of course less drag will equate to more speed and a flatter trajectory. But the claim that is being made is that he has more drag over the first 30 yards than the last 30. An arrows rotation will be achieved within the first 10-15 yards on a well tuned bow so drag would be constant from that point on. There’s plenty of high speed camera film of this.Gravity over that whole span will also be constant thus creating gradual increases in pin gaps. Not a larger increase for the first gap then gradual for the rest. Just doesn’t work that way.