Impacted higher? How?Less drag maybe if shorter...Less spin if straight fletch vs helical...
They fly fine. I'm still not going to use them. They are harder to fletch than feathers or any previous vane. They deform and wrinkle in no time. Seem less durable than feathers. It's incredibly easy to waterproof feathers. Some camp dry, any other spray silicone, or even hair spray. Cool idea, but fell short again. By the way, I've fletched thousands of arrows. Including a bunch that won many tournaments. You really need to tinker with your jig to get these to meet up with the shaft. I am picky though and my standards may be different.
Aron Snyder and a few others have 1000's of shots in with them now.They can wrinkle but it does not seem to affect flight even a bit.