I ordered a Ping G5 from ebay with a stiff flex Graffaloy Prolaunch Blue shaft. After receiving it, I played 2 rounds and shot my personal best and another good round. I looked at the shaft after those two rounds- regular flex. My swingspeed hovers just over 100mph, which according to most sources should use a stiff shaft. The guy offered to replace the driver, but I need it for golf try-outs, plus I'm hitting it good. The only problem is I hit the ball so high that in any kind of wind it's hard to control. What do y'all think? I'm pretty sure I'm going to keep it.
the prolaunch blue is a high launching shaft. So thats why you are getting the super high ball flight. The 100 mile an hour swing speed is around border line for regular/stiff depending on your tempo and wrist release.