The 'variables' are almost endless. I saw Rickie with a persimmon wood drive it a *total* of 298 yards, ie carry + roll. (Maybe it was part of the same 'study'). He generates a lot of club head speed. Match up/dial in the persimmon's loft and shaft flex and length and get a ball with say, a bit lower compression and higher spin off the driver, and then have Rickie mess around for a week with ball position and launch angles and he'd be driving it, what, 310? He could play any course in the world from the tips, and win. And I'll never believe that JN was generating *less* club head speed in his mid 20s.