During my ride along the Rhine in Sept 2012, I met up with some German guys who all used butterfly bars. They said they managed with headwinds by laying their forearms across the bars. Maybe that would work -- I sat on one bike, and the "lowered" position wasn't bad. But still, I recall cycling along the south shore of the Gaspé Peninsula in late July 2010, and one morning, we rode for 6 hours into a brutal westerly: covered just over 60 kms. Can't imagine handling those conditions with anything other than drop bars -- unless, of course, you just do what canoeists do when windbound: set up camp, make tea, read a book/whatever, until the wind drops.