duffer -
That IS a good point. Putting out of the fringe DOES result in some "drag" on the ball as the FRINGE is thicker than the green itself. I find that more often than not, this is a SMALL amount but I have seen exactly what you describe as well. I think it depends HOW MUCH DISTANCE of the FRINGE ITSELF you have to putt across - AS WELL AS a more severe effect if you are putting UPHILL in FRINGE.
Now that you have me thinking about it - HERE IS THE PROBLEM....(A different one than the putting meter BUT related to this situation).....
There is OFTEN an inconsistency between the MAIN GRAPHIC which may show the ball ON THE GREEN even though you got the pop-up "ON THE FRINGE" Message. The "Lie Indicator" on the bottom RIGHT is OFTEN difficult to tell if I am laying on GREEN or FRINGE. I WOULD HOPE FOR A FRINGE LIE TO BE CLEARLY INDICATED HERE - much like "30-40% ROUGH" etc is. It is OFTEN hard to tell where exactly we are putting from - FRINGE OR GREEN. Regardless of what the MAIN SCREEN shows - I always go by the Lie Indicator.
SIMILARLY - How come we AUTOMATICALLY default to PUTTER (with no ability to choose a wedge) when in FRINGE? There are MANY instances when I am in the FRINGE where if it were real world golf, I would choose a wedge and not the puter. How come we cannot make this choice from FRINGE?
Maybe The Gods of WGT are working on this - if not - take it as a suggestion for a future enhancement.
Regards, AtlantaCoaster