Strictly speaking for myself, I believe one can still infer or make certain assumptions from this data:
- The main goal of a Tour Pro is to shoot low scores and win tournaments. Some amateurs have other priorities such as looking good or chasing that feeling of puring a blade. I did too, but now I just want to shoot the lowest scores I possibly can out of curiosity.
- Some Tour Pros have to consider, to some degree, their sponsors when putting a club in their bag. But this is probably not a consideration when deciding to play a Nike full cavity 3-iron vs. Nike blade 3-iron vs. a Nike hybrid.
- If 40% of 2010 tour winners play a hybrid or GI 3-iron, what was I doing with a 3-iron MP-60? I don't have nearly their talent or as much time to practice. Again this statement is just for me, and I am only sharing because this is what I found useful since you kind of asked - not trying to start another amateurs with blades holy war.
I chose to focus on winner's bags for two reasons.
1. Though it is infinitely debatable to what degree, equipment does play some role in winning a tournament.
2. It's obviously impracticle for me to compile equipment stats (which are always changing throughout the season) for all tour pros for an entire season.
Phil's driver loft was what he played when he won the 2010 Masters. According to CrazyXGolfer, it may have actually been a 6.3 lofted driver and he may be right.