For clarification:
1. In NO way do I believe or mean to imply that green speeds are anywhere near the top of the list of reasons for slow play. I agree 100% with those of you that believe that individual players primarily determine pace of play, and that there are several other factors that are also much, much more significant than green speeds.
2. I interpreted the discussion to be about the question of whether or not extreme green speeds take longer to play, rather than where that ranks on the list of reasons for slow play.
3. Since most golfers don't fully putt out in most rounds, greens speeds don't matter in the pace of play for most golfers in most rounds.
4. I'm an outlier, I think; I play a lot of low-level competition, on a lot of different courses with greens at a lot of different speeds, both bent and bermuda. Consequently, I putt out even in casual rounds unless ESC has reared it's ugly head.
4. All of that said, I think that extreme green speeds matter to pace of play primarily on the newer hybrid bermuda greens, simply because putts can get away from even good putters in a way that simply doesn't happen on bent grass. You don't have to agree with that, of course.
So PLEASE don't quote me in a post in which you rant that green speeds are way down the list of pace of play sins, ok? That isn't in question, and I don't disagree anyway.
But if you can play a round on Champion Bermuda greens that are running 11 or 12 in which you putt everything out and score matters as fast as you play on greens that are running 9 or 10, you are different than anybody I've come across.