I now have about 12 hours using the Greenland paddle. I love it. Started with basic strokes and worked up to braces and extended paddle sweeps. Nice and easy, no hurry. It seems pretty efficient to me. Can't get into all the physics, just want it to feel right. This weekend will be the "wet" work, sculling and rolling. All the reading beforehand paid off, I had a real good sense of what I was doing. Thanks for the help, I'll keep you posted.
City Island, NY