I had two newer players play with my shafts and theirs just last week, with the Revo they both had a much easier time moving the cueball around, these are C level players. They tried a few other shafts I had, again both felt they could get more action on the cueball with those shafts than theirs. I saw the one that was the worst of the two improve his draw at least a foot using the Revo vs his cue.
I don't know how others play to not see a difference, but myself and every player that tried out the shafts I have, found that the higher tech shafts could move the cueball easier. Years ago myself and another person who is a better player than me tested out like 8 different shaft and tip combinations using low right spin. The most spin we got was from an LD shaft with a layered tip. We shot 5 shots each with each shaft and saw how far down the table we could spin and make the ball. The results were from about 1.5 diamonds up from the corner pocket to pretty much to the corner pocket with the most actiony shaft/tip combo. It was a pretty scientific test, we both saw the same exact results with the same shafts, meaning we both got the least action to the most action with the exact same shafts. They make a difference. We are not comparing how good a great player can play with a shaft vs a weak player can play with a better shaft, but what the same player can do with the different shafts. It does not matter one bit if Earl can play better with a $100 Cuetec than most of us can with a $5,000 SouthWest, what matters how the same player does with the two.