K -
I don't disagree with that at all, and indeed that's part of the point I was trying to make:
that if even the very best golfers in the world, who started putting at the age of 5 and have been practicing constantly ever since, can have such 'variability of results' -- ie can be mediocre but then get 'hot' enough to win a major -- think how much more variability there is in the average golfer's putting game, one where the stroke (and the results) seem to change if not hole by hole than at least day by day.
All I'm suggesting is that the 'pin in-pin out' test that Jim & AG mentioned seems to leave out (and fail to test, and can't test) a range of other subtle & quixotic factors.
PS - like Jim, I take the pin out because I'm convinced that otherwise there's not enough room for the ball, especially with my Crenshaw-like touch that sees putt after putt dying at the hole and dropping in on the very last roll.
Also: I dropped the sweaters for the summer and have upgraded all the way to a Ping G10 driver!