Tom,
The only time I believe those greens would get to 10 is if someone, like the super or Mike Keiser, wanted to see what they'd be like at that speed, or, for a special occassion.
But, day in and day out, I can't see them at that speed.
How did my putt not go in the hole on # 17 to top Ran ?
They must have been experimenting with the 17th green that day.
JakaB,
I can only speak for BD and PD, but, my answer would be NO.
I don't think it's practical to keep them much faster, irrespective of public versus private play.
Could they be a little faster on the times when I've played them, sure, but, not at 10+
As to too fast, then you haven't played Atlantic when they're 13 and the wind comes up.
Yes, greens can get too fast, unless you don't mind 6-8 putting and putting off of greens, 30 yards back down the fairway.