I've made, shot, lost or broken a thousand + wooden shafts (cedar)in my life. I'm much more particular with them these days than I was "back when". 30 years ago I'd order a hundred at a whack that were spined and supposedly weighed... maybe they were close and maybe they weren't.
I do know that my buddies and I put a lot more effort into knowing our equipment in those days since we didn't own either a scale or spine tester. We learned by shooting them and came to know their personalities by doing that. We were too poor to be able to discard any but the most weird flying of the lot.
I could go on and on about the great long shots we made with those arrows. It wasn't just luck either.
Today we have the benefit of being able to procure the most closely matched shafts ever and be able to purchase more that are very closely matched to previous sets. We also have learned the value of owning a simple scale and spine tester just because you can never be too careful.
I shoot with confidence that every arrow I shoot will follow the one before to it's target as closely as I'm able to shoot.
My main concern with wooden shafts is the possibility of warpage and even that is unlikely with premium shafts.
My first antelope taken at 55 yds. Cedar shaft and Zwickey Delta. Shot was taken from the hay stack in the background.