This is exactly what is needed. If we could all read greens like Tiger we'd have much better luck. And the grass (from what I've read) type such as Bermuda can offset break if it grows toward the sun etc etc...
I've had the best luck "plumb bobbing" even though many say it doesn't work. I can't believe you can stand on a green and tell the tilt.
When Tiger writes a book on this I'll buy it!!
Caddy Tip about How to Read Greens Golf Tips - Reading the Greens