Interesting. I find the Sitka products to be some of the quietest products I've ever used. Both the Status and Fanatic lines.
I've heard the fanatic is quiet but the Stratus has a distinct crinkle in the windproof membrane. Probably not enough to matter in most hunting situations but drawing a recurve at sub 10 yds in the Stratus will almost always cause a deer to hear you. It's better than most but, I'm still in the lookout for something quieter.