TE,
That was the point of my post, is to point out the fact that there is no true percentage of pinable areas as this changes based upon a combination of green contours plus green speeds. An archy that understands basic agronomical issues, and most do, will give you at least 4-5 pinable areas on a green, and hopefully more. It is up to the super to be responsible enough with their green speeds to maintain those pinable areas.