I assume it just works kind of like association, so they could tell you associate social interactions with happy thoughts and feeling confident or whatever. Rather than how we think, "OH GOD! People are talking to me aaaah!" or whatever..
I would love to try it, but I just doubt it would work, and would never spend all that money to try! If it was on the NHS or something, I would be all over it. But like someone said above, it's not usually offered as a treatment, and there is probably a reason for that.
Currently taking 20mg of Paroxetine (Seroxat). It's not very useful. Better than nothing.. but only just.