YankeeJim: the advantage of knowing those Champion speeds does give them some advantage
I'm not sure that there's much more than a mental advantage, YJ. .
I'm too lazy to look up the numbers, but we know that Tournament greens have a range ... like 11-12 feet on the stimp meter, with TM's getting the slightly lower tourney speed & Legends slightly faster. I tend to think that Champ greens also run in a similar range.
When I play a round WITH a TL, I don't make any real adjustment for "champ" greens ... they just don't seem to be much faster than normal. (I felt the same thing as a TM playing v. Legends).
It could just be in my mind, but champ greens in tournaments ( solo rounds) definitely seem faster than they are during mixed-tier rounds.