Not sure what (if any), impact this will have on the discussion at hand....however, when looking at the breaks on the greens here, I've always assumed that the dots represent the average break for that particular grid square (2ft, if I'm not mistaken?), both in direction and in speed.
I've also assumed that the break (as programmed into the game engine), reflects the actual break one will find out on the real course, as closely as possible.
Given that course designers don't use 2ft grid squares when laying out courses....there's bound to be some places where the break you encounter is slightly (or vastly, in the case of Cabo 11), different from the break shown by the moving dots.
Not saying it's either right or wrong....it simply is.
If in doubt....pull out your wedge and look at how the colours of the gridlines change as you move the grid around a little. That should show you where the break ends, or starts, on a particular putting line.