Backache
Assistant Pro
I agree we don't know It may vary but at the moment as far as I can see there are a lot of clubs marketed for older people with slower swing speeds but not a lot of balls and when I see ball tests conducted by the likes of my golf spy, longer balls appear to be longer through all swing speeds though launch angle and peak height may vary a bit so I suspect the longer ball for the slower swing speed golfer at the moment is a bit mythical.And there's the problem with this whole issue...
Not having a go at you but "if it's 5%" .....do we know that?
Is it 5% for the Pros but next to nothing for us?
We don't know....