Edward, I was thinking the exact same thing. Maybe we need more sex, drugs and rock & roll in this thread.
Anyway, mostly I'm wondering how well the back can be flattened out if you lower the back pole, or else tie it further back on the guy line, or even not at all. My take (or worry) is if anything, the back shape (not the pole per se) might make it *less* wind worthy. Seems like it may be a bit tricky to both flatten it and get a good taunt pitch because of the shape. zpacks sells some nice guy out loops so maybe once I see it some extra guy point could be added specifically for the high wind contingency.
I'm sure it will shed wind fine most of the time - my main concern is for the "oh shit!" type situations. I realize it is a little unfair to expect a shelter like this to be all things for all conditions.
Ian, in the absence of an actual high-wind test, can you pitch the back at a much flatter angle without having the tarp sag, or be loose. In those situations I would also expect the bottom guy outs to be staked directly to the ground as well. Of course you will pay by losing some interior room, but on the nights where it matters that will probably be the least of the worries.
I know it would make more sense to have started this thread BEFORE I ordered one. I don't think it would have stopped me either way. I wouldn't have had to ask the question if I had the actual thing to set up. For me it isn't a question of practical experience in wind, just a wind-worthy way to tweak it.