Jeff, When the pin is placed there it creates all sorts of things to happen in the golfer's minds eye, which I conclude lead to a higher scoring differential.
A. The player misses the shot leaving a difficult recovery.
B. The player plays the wrong shot also leaving a difficult recovery.
C. The player plays short and safe, leading to three putting.
D. The player executes ending in a low score.
The fourth at Spyglass didn't mmediately come to mind, but since you asked about the narrowness, I can confirm that green also provides greater score differentials for all the reasons listed above.
All of Pebbles' greens are narrower than most, and at the elite level, the 2000 open surely had a score differential.
I'd like to know why Patrick thinks it's just the height differential?
All the two or twenty holes have what in common? Surely not length.