I carry a hybrid. A 3-hybrid. I also carry a 3-iron.
Reason being is I'm much longer off the tee with the hybrid and I can hit it varying distances depending on what shot I want to hit. Plus it's far better out of the rough. I don't get too bogged down on hybrids being bad, mine looks similar to a 5-wood I used to have. I do think that getting 2, 3 or even 4 hybrids is a bad idea if you want to get better.
I can understand why PGA Tour pros prefer CB's. Today's PGA Tour courses are more carry oriented and I think you have to hit a lot more shots higher or they won't hold greens, etc. Though I think with the technology they have on hand, they could keep the blade head, change the shafts, tweak the lofts and still get the window traj. that they want.
I think it's neat that Trackman can test it, but I think it avoids my point that *over time* you will likely be less precise with using CB's than using blades. Let's say you're striking the ball well enough to average 14 GIR on a 130 slope course with blade irons. You may possibly hit CB's on Trackman and test out better that day than with blades, but my theory is that if you switched to CB's permanently, you will become less precise over time, be it a month or 3 months or 3 years from now. And in the future you could test yourself again and find that you hit CB's better, but now your hitting the ball well enough to hit 11 GIR on a 130 slope course.
But, had you stuck with blades, even though Trackman shows you can hit better shots with CB's, I think you'd keep the precision in your swing over time and the overall results would be better.
Of course, these are my theories. Great strikers of the ball like Kenny Perry, Heath Slocum, Hunter Mahan hit the CB's quite well and have used them for quite some time. Although I believe Sergio's ballstriking has dipped the past 2 years and I think part of it is due to the contant switching to Taylor Made CB's.
But on the flip side, the great ballstrikers of all time...Hogan, Moe, Trevino, Johnny Miller, Snead, Nicklaus, Tiger pre-Haney...all used blades.
It's tough for me to tell anybody that they must go to blades, but I certainly see where Dr. Zick was coming from.
3JACK