Re: "...in winds potentially gusting way above 50 mph."
Reviewer: "The Rab Summit tents are single-purpose pieces of equipment designed to provide a very secure (and cramped) shelter from the worst conditions that the high mountains of the world can dish out. The low roofline that interferes with living space makes this shelter ultra wind resistant. Unlike the sail-like sides of the other mountain tents, the Rab presents a low profile to the wind. The Summit tents pitch very taut. The construction, fabrics, and zippers are burly. You get the feeling that the tent is over-engineered for all but the most extreme conditions. There are 13 guy-out points on the tent, along with beefy guy lines that have springy bungy attachments to absorb the shock of wind loading.
The Rab Summit Superlite Bivi is the uber compact version. The Rab Summit Mountain Bivi is the roomier version. Both tents share the same fabrics, floor size and basic design. The difference is in the ceiling height and features.
Integral Designs, Marmot and Mountain Hardware [EV-2] do make single-wall, bombproof tents, but they all use less breathable fabrics.
Rocket Tent Specs:
Winter weight (without poles): 1 lb 5.9 oz (620 g)
Summer weight (with included poles): 2 lbs 0.4 oz (920 g)
Floor area: 21.5 ft2
Vestibule area: 7.0 ft2
Peak height: 38"
Packed size: 6" x 10" x 2"
For What It’s Worth: (I have no affiliation with the following): The Cuben fiber (metallic coated CTF-3) Rocket Tent by Brooks-Range Mountaineering is billed as able to handle all four seasons, weighs under 1 ½ lbs (620 g), and is reviewed with LOTS of pictures at: http://www.alpineambitions.com/Alpine_Ambitions/Rocket_Tent.html
“Overall, the tent performed extremely well in high winds. I intentionally set the tent up in the worst location I could find, just to see how it would do. My first impression is that it is easier to control the tent in the wind, during set up, then I imagined it would be. I expected a kite, but it’s really not. By the time it’s open enough to catch a lot of wind, it can be anchored. Once anchored, it was bomb proof - even in strong winds on a ridge top. The wind did effect the tent by loosing up some of the guy lines, so some flapping began to occur after an hour or so, but a few adjustments helped. Overall, it was tight, and I was not nervous.”