If I am stalling and/or using some kind of annoying stuff like rage quit decks I do start a conversation, it feels only polite to do so. If we both are rushing my opponent might get a gg or a funny comment about how his Destroyers have met their end. Of course, if I see awesome deck concepts I do ask about them, and I do talk to uber-newbs with fail decks on PvP1 to direct them here and give them some advice. There's also many PvP2 people who think they are far above your level, and I also enjoy some trolling in the form of "Admiral Ackbar says: It's a trap! PS - You are screwed", after which they sometimes ragequit and make the game that much better.