To be honest, it was a thoroughly disappointing experience. Even if I had been given an hour's conversation with him, I feel that the author/reader relationship would have dictated all of it. Rothfuss is, if nothing else, a witty and agile speaker -- and it saddens me that I'll never be able to experience that wit in an informal setting.
Who indeed is so close, yet so distant?
All of that having been said, I'd still recommend that you attend a favorite author's book signing. It's both enjoyable and disappointing, and for nearly the same reason -- if that makes any sense at all.