I don't think she was acting uppity or know-it-all in the least. Nowhere in your description of the events do I see any indication of this person being the bigoted, belittling, uppity, insulting, know-it-all sourpuss that some responders have called her. Cut her some slack. She was clearly interested in what you were doing by asking about the techniques you were using and it seems to me she was trying to learn from you and help you at the same time, you being a new quilter and all.
As for apparantly not knowing Sharon Schamber's name or reputation, I certainly wouldn't hold that up as a measure of the knowledge or quality of anyone's quilting. She has her way of doing things, and she certainly knows how to market them, so if they work for you, fine, but there's no need to be a snob about it. There are lots of excellent ways to get the same results in quilting.