As I stated in an earlier post, this data is not Hank Haney data, it is TrackMan data. Hank was just sharing this information in a tweet. This slide was presented at a TrackMan users conference in November of 2012. I was present at the conference and wanted to confirm the data before I posted again.
The information presented in the graph was taken from over 3000 golfers that have taken TrackMan Combine test. These assessments were conducted by TrackMan operators over about a year period all over the world. The 24 data points represent the handicap range of +5 to 18. For each handicap there we a minimum of 100 players. Because of the nature of who tends to take the Combine (mid to lower handicap golfers) there was more data collect in the low handicap range. At each handicap, however, there have been enough data collected to draw this correlation.
Since this information was presented, there have been significantly more Combines administered. At some point this year TrackMan will again analyze the data.
While there will always be outliers; i.e. a 3 handicap that only has 85 mph club head speed or a 18 handicaper who swings it 115, there is an very high correlation between club head speed and potential handicap.