DarSum:
I wonder why we never see Championship greens anymore? There used to be some on here but I never see them anymore.
On the speed issue, I'll post two putt lengths for Tourney greens. These would be the length I use for FLAT putts.
13 ft I putt 10 ft.
20 ft I putt 15 ft.
See anything wrong with those numbers?
Tournament Greens are being reserved for special events (The Opens and other high profile tournaments) as per a post I can't find right now.
I'm going to assume when you say 10ft power for a 13 ft putt that the 10ft portion would be 2/3 of the full 15foot scale. I would have to say that it is a bit too much speed, but not much. You can always tell by how far past the hole you go if you had the right speed or not. I tend to try and put every putt 1-2 feet past the hole any more than that and I know I've hit it too hard (of course that's relative to any downhill slope past the hole)
However, by your description of the issue, I'd have to say that you are not judging enough break into your putt, and I would say you would need to consider the fact that if you have to hit the ball with less pace (relative to a slower green) you definitely need to adjust for more break as the slower a ball rolls the more it will turn on a slope. Something to keep in mind.