Everyone wants "statistics".... Here are some great ones..
In 1993 a mere 20 years ago John Daly led the PGA tour in driving distance. He averaged 288.9.. In 2012, he would have been in 104th place led by Bubba @315.5.. 104th place in 1993 Was Jay Don Blake @258.1 yards.. In 2013, the Champions tour leader, (one of us old guys) is John Huston @ 295.2 who in 1993 (his prime) averaged 270.6..
Look at Jack Nicklaus'' average driver distance compared to Ben Hogan's