I guess it all depends. I really want to say "No, I can play as well alone as I can when I'm being watched" and while I think that's mostly true, I find it harder to start a game when other people are around. Like, if I'm on my own I can pick a game, pop it in and be playing in seconds but if I'm picking a game for co-op it takes me a while to get into the gaming frame of mind (of that makes any sense). Once I'm already in the game I'm there and, perfectly fine.