"The weight from the bend of the hook is well below the center of gravity therefore the hook rides in a manner...."
Most of the time this is true, but Gary LaFontaine's Dancing Caddis http://www.virtualflybox.com/f2300/f2316.shtml has the wing tied on the underside of the hook. This causes it to usually to ride point up so it can be skated. This probably isn't something you might do with a streamer. But then again, a "minnow" skittering across the surface of the water might attract a fish or two.
