I would change my vote to slightly narrowing. When I voted, I was thinking long putts where the make percentage is low. But it does raise a question. Certainly at 5ft or maybe 10ft, the gap is narrowed because it could only hurt the better putter. At what distance does it start to not matter? Like at 30ft, chances are already low of making a putt amongst the best. Adding in bumpiness is not going to make much difference between the two skill levels. So at what distance is the breaking point?