If a golfer departs a wide range of spin profiles when chipping he/she is a poor chipper and it will show up regardless of ball. You are making a common error in research methods by assuming every chip shot that results in inconsistent spin produces a negative outcome. A crappy chipper with a wide dispersion of outcomes regardless of ball will produce "inconsistent spinning shots with a urethane ball" that can still produce a better outcome than with a surlyn ball.
A common anit-urethane ball meme is the ball that checks up too early that if the player were using a surlyn ball the golfer would be closer to the hole. What is never mentioned is the urethane ball that goes passed the hole, grabs some spin and stops when the same shot using a surlyn ball would be farther away.
You can't have it both ways.
If a player is presenting the club to the ball so that is ProV1 is producing significant different spin profiles than his dispersion is as likely to be past the hole as it is to being short of the hole. The main character trait of a crappy chipper is abysmal distance control. Unless the golfer is consistently short or consistently long, than his dispersion will mostly approximate a 50/50 coin flip outcome. Half the balls short of the hole, half the balls past the hole. Using a urethane ball helps in half the cases and hurts in half the cases.
Any golfer using a surlyn ball that has successful outcomes that are statistically significant beyond a coin flip can certainly use a urethane ball without any drop off in outcome.
