Re U-grooves: You bet, Thom. You think these guys aren't paying attention?!
Re Their gear versus ours: Their's is fitted...and to the 'nth' degree. In the photos attached, Brian is trying three different shafts (courtesy of Jim McIntosh and United Sports Technologies) on two different heads (courtesy of Mizuno). This kind of stuff does not happen just every now and then, it is constant. You want something different? Just ask...and it's in your hands within the hour.
It's fun to be a PGA TOUR pro!
I guess they're bombed from all angles, it's actually a Titleist head in the last pic.