The Tour median (#5 thru 50) in 1996 was 277, and in 2001 it was 290, or 13 yards. By 2000 twenty five percent of the ball count on Tour was non-wound balls, by 2001 it was over ninety percent. The R&A seems to have mixed one era with the other, I did not.
I don't know how GD conducted it's survey, but the median in '93 was 271.3 and 288 in '03.
edit: no, I did the mean. If you want to do the averages be my guest, but I don't think they'll be much different
Jim, I believe the huge--overlooked--factor in this equation is that none of these things actually caused the ball to go all that much farther. Remember, Bobby Jones hit some 500-yard drives in the 30s. George Bayer did it in the 50s.
And Nicklaus did in the 60s and 70s--but not when he was trying to win a golf tournament.
As I said in another post, I played golf against Gary Woodland when he was 15, and he was playing a Maxfli Revolution, and it was MUCH straighter than the balata balls that pros were playing at the time.
And that was before the ProV1 came out.
Over the last 13 years or so, Gary and other top players learned that, unlike Jack, they didn't have to throttle back with the driver to keep it on the golf course. The combination of big drivers and relatively straight balls have resulted in giant gains for those players, and it's trickled down to the big, strong bombers even at my club.
But it hasn't had that effect for me. Now, a lighter ball will be shorter at high balls speeds, but more importantly it will rebalance the equation between power and control, to something like what we had in the 1970s.
At low ball speeds, like me and my wife, it might actually fly farther.