Ah, I get what you mean. Of course, you're going to get great, welcoming players, and you're going to get snobs. So it's always best to get a feel for the players at a table, especially if you don't know any of them. You'll see if you watch Spoony's "Pathfinder Live" sessions, where he plays with some veterans and some newbies together, that he definitely tries to be encouraging and welcoming, but he also gets frustrated. With a game so complicated, it's expected that you wouldn't know every intricate detail (veterans are sometimes surprised when weird rules come up). In some videos, Spoony even talks about how to deal with new players, and how even he has gotten snappy at times (and admits it was wrong to do). But as long as you make an effort, I think most players will respect that and will work with you to make sure you get everything.