Mine sure as hell have, missing a ding slightly sends the ball way off line and a bit of back spin drops the ball 30 yards short. I know they react differently to b/s than other irons but they weren't always this bad. I went back to the Ping i15 a few days ago and my scores have dropped like a safe falling onto Wile E Coyote.
Seeing as there's apparently new gear coming soon I can't help wondering if these irons have been messed with to encourage everyone with them to buy a swanky new set. If mine still played as well as they did when I first got them I would think twice about a different set, now I'm casting glances at the water beside #17 at Kiawah.
Has anyone else experienced this or do I just need some new tin foil in my hat?