Here is a nice comparison to stimpmeter green speed readings at some of the countries best clubs over a 30 year span.
Everyone talks about this topic especially during Masters weekend.
I want to remind everyone that the real quality of a putting surface is in the quality of the ball roll or smoothness of the surface. A firm true putting surface can only take place when proper and adequate vertical mowing and sand topdressing is the backbone of the cultural program.
Another factor in ball roll quality; especially during evening rounds is proper Ballmark or pitch mark repair by the golfers. Everyone must do their part.