I agree with, and I'm much, like Dariusz.
Seldom three putt. If it's going to happen, it's usually because my first putt is above the hole and long on fast greens.
Lagging is no problem. Usually my partners tell me to 'pick up'. I read all putts from behind the hole, then walk them off, adjusting the backstroke for more or less on uphill/downhill respectively.
What's keeping me from be an outstanding putter is that I don't make enough one putts. I watch the pro's on TV and I'm blown away by their one putting ability. I've been practicing hard lately in the 12 to 15 foot range. (Seems that's as close as I can get my irons.) Working on chipping a lot to facilitate getting up and down.
Great survey.