I play both for a long time, mostly DotA.
Just like you I was expecting people to just freak out in this game due to how bad people say the WoW community is. Turns out far far from bad, or at least DotA level bad. *edit in game, not the forum, such as this one.
On topic, I met all of those people before, but it is pretty rare. People only remember things that stand out to them.