David Moriarty said to JVB:
"First, your assumption that the increase between 1953 and 1980 was not related to technology is specious at best. Balls changed, shafts changed, clubhead technology changed. It just gets lost in the blur of what happened recently."
David:
And exactly how did balls and shafts and clubhead technology change between 1953 and 1980? If you're going to make some claim that technological change contributed some yardage distance increase then back it up with something other than a guess.
"Second, you take this very questionable number and you extend it over the next 25 years (1980-present) as if it were some sort of constant. There is no basis for assuming that there is some magic constant out there. It is just a convenient guess."
You're right there probably was no numerical constant or a constant technological reason for distance increases between 1953 and 2005.
"Please someone explain to me where this distance came from if not the equipment?"
Why don't you just look at some of the distance threads on the back pages and you should see the specific reasons attributed to distance increase from app the early 1990s until today? The specific factors contributing to distance increase in that basic timeframe have been discussed on here endlessly. The Tech Center today assigns about 26 yards in increase (to the average tour increase not the top longest whatever you mean by that) and Frank Thomas who was the Director of the Tech Center for 26 years assigned app 28 yards of increase from app the early 1990s until today broken down in basically three equal co-equal contributing factors---!. COR, 2. The new age ball, 3. Optimization.