I'm not going to lie, when I first read the title of this tread, I kind of had to laugh. My first thought was kind of a sarcastic, "Wow, no kidding!" But I do think studies like this are important. The tricky thing about social anxiety disorder when compared to other types of mental disorders is that it's essentially impossible to measure by objective means. You can't exactly pop me into an MRI and go, "Look, this part of your brain didn't light up like it should, so that means you have SAD!" I think anything that can be done to quantify and measure anxiety disorders and make them seem more "real" to the people who don't have them would be helpful in the long run.