Matt, the comments were about pinnability not puttability. No one ever suggested the "bulk of the green is virtually unputtable". You pulled that one out of thin air. My "guess" was merely that the edges are not pinnable since they curl up in punchbowl fashion. Since when are unpinnable areas an indicator of poor quality? How many great greens don't have unpinnable locations? I've only played Peachtree once, so I am no expert. But I found the #10 green to be equal parts fun, challenging and baffling.
Ed