Tim:
I put some statistics from 1980-2004 in this thread in an effort to provide data to illuminate both sides of the argument on this issue.
http://golfclubatlas.com/forum/index.php/topic,16574.msg288155/A couple of possible slides from the thread:
Slide 1 -
Until 1848 Feathery 140 yards
Until 1902 Gutty 190 yards
Until 1945 Wound 230 yards
Until present (1996) Modern 270 yards
Golf Course Architecture, Design, Construction and Restoration at 30-31 (Sleeping Bear Press, 1996).
There probably should be an additional category setting distances in this decade at 295 yards or so. The current distance increase is along the same lines of increases associated with other significant equipment advances since
Slide 2 - Driving Distance for 5th Ranked and 100th Ranked PGA Tour Players
2004 (Difference 16.9) 5. Chris Smith 304.0 100 Steve Elkington 287.1
1999 (Difference 19.1) 5. Harrison Frazar 290.5 100 Rocco Mediate 271.4
1995 (Difference 17.
5. Kelly Gibson 280.2 100. Chris Demarco 262.4
1989 (Difference 16.0) 5. Bill Sander 276.9 100. Jim Benepe 260.9
1980 (Difference 14.9) 5. Joe Hager 270.4 100. Tom Jones 255.5
(I chose the 5th ranked player rather than the first based on a belief that you can eliminate special circumstances by throwing out the longest distances.)
I would add the 2009 data to this list which will probably be relatively flat compared to 2004 or possibly down a bit