In our defense, we're also capable of having extended, knock down, drag out conversations where everyone acts like a complete douchebag. But yeah, it's also less frequent here, which I do find refreshing as well. I think there's a tipping point where when you have enough positive behavior, people find themselves naturally behaving better. There's probably a sociological study to be had there.
We also have good and active moderators, which is a big part of it, too. A lot of what would spiral out of control is nipped in the bud.