Without getting in the debate of "athleticism" and how it can be measured, there is no doubt the athletes in just about all sports have gotten bigger, stronger and faster over the past 20-30 years.
I remember once reading that 5"9" to 5'11" (Nicklaus, Palmer, Watson, etc.) was considered the "perfect" height for a golfer. Guys like George Bayer and Mike Souchak were considered to be unusually large among professional golfers in the 1950's & 60. Now you have dozens of guys (Els, Mickelson, Singh, Couples, Quiros, Colsearts, Overton,et al.) playing at the highest levels of the game who are as big or bigger than Bayer and Souchak.
It is the same in just about every sport. Pitchers in baseball, many of the top tennis players, even pro hockey players, are now routinely 6'3" or more. If you went back 30 or 40 years, few of the top athletes were taller than 6 feet.
"Interestingly size is not the biggest factor in power or speed and hence long driving."
Padraig D. -
Have you ever seen a professional long-drive contest? The majority of the competitors are well over 6 feet tall and weigh more than 200 pounds.
DT