As I mentioned earlier, I play on Bermuda greens. It might be possible to maintain Bermuda so it putts smooth, true and consistent at a Stimp of 9 but I've certainly never seen them any slower than that and not bumpy and grain-ridden.
And yes, I realized that someone is going to chime in any moment and tell me that grainy is good and for all I know bumpy is good too. Whatever.
The greens I currently play have a *lot* of contour. To the extent that they would not be playable cranked up to 12+ feet like a typical PGA Tour setup. But they are, in fact, puttable in the 10's and 11's assuming due caution, good nerves and (dare I say it) suitably strategic play. They are more fun to me at 10 or 11 than at 8 or 9.
It's absolutely possible to cut greens too fast for their contours. With flat greens "too fast" might be a grass-killing, over the top 14 feet. With my club's greens "too fast" is probably in the 12-ish and up range. I'm trying to imagine a set of greens so contoured that anything greater than, say, 8 feet is "too fast" and honestly I can't imagine such extreme contours are any more fun to play than the ones at my club.
So basically we have a set of preferences at odds here. Some of you lot want to see as steeply sloped, highly contoured, boldly shaped greens as possible even if that means the grass is maintained at a pace where 20-foot putts damned near never go in the hole. And any speed that's "too fast" for those contours is a terrible travesty. Is that a fair enough characterization?
For me it's the opposite. I want my (usually Bemuda) greens to be smooth, true and fast enough that a well-struck and correctly aimed putt from medium to long distance has a fair chance of going in the hole. If that means that I only get to play greens with moderately large slopes and contours, so that speeds of 10 or 11 are not "too fast" then I can live with that. Trust me, there can be a whole lot of contour in a green that's rolling 11-1/2 on the Stimpmeter as long as you don't expect every square foot of those greens to be pinnable.
And somewhere out there are golfers (including probably the typical Tour player) who wants to putt on greens even I think are over the top. Stimp readings of 12, 13, whatever. And they are willing to settle for greens that are pretty darned flat to make that possible. It's just a tradeoff and there is no moral or ethical basis for asserting that slowing down greens to allow huge slopes is more fundamentally valid than flattening greens to allow huge speeds.
Some courses have water hazards on every hole, others can be played with a putter from every tee to every green. Some courses have hugely contoured greens that require slow putting speeds, other have extremely quick putting speeds that require modest slopes. And down here in the land of even Ultradwarf Bermuda grasses, the inevitable cost of slowing greens down to the kinds of speeds Sean probably recalls from 25 years ago is going to be grain, bumps and inconsistencies. And again, yes I know some of you profess to just Love Love Love all the grain you can get but I suspect that's a rhetorical ploy at best.