I'll throw in my two cents here. Wing paddles are great for flatwater racing using high-angle Euro-style paddle techniques. I tried one with my upper-hand-never-above-my-chin touring stroke and it didn't work well at all. It kept trying to rotate in my relaxed grip and had a tendency to want to take off in unintended directions. I felt like I was fighting the paddle. Others have noted that wing paddles are less than ideal for sculling. I'd add that they don't impress me as being all that great for any other support stroke either. For me, the wing is a specialty paddle that doesn't work for my more relaxed touring style. I'm on the water to have fun, not set a new record from Point A to Point B. On the other hand, I've had a thunderstorm blow up suddenly when on a lake and found myself in need of every bit of reliable control I could find. My paddle choice? It's a semi-Greenland style paddle that I can swing almost effortlessly for hours but still have the support strokes I need when things get a bit rough. I won't state the specific brand but if I ever wear this one out I'll buy another just like it.
John