Philip -
Yes, those five greens you mention at Dornoch are quite large. You can hit 3 different clubs into those greens, depending on where the hole is located.
The long, relatively narrow, diagonal green on #5 makes it a very, very good short par-4. If the flagstick is up front, you can hit your tee shot down the right side of the fairway. But if the flagstick is way back, you really want to be down the left side of the fairway, so that you have a much better angle to hit into the green.
DT