Yes, it's very American. But not necessarily "Average American". The people here tend to have a sense of humor which has more in common with the Brit and Aussie senses of humor than your average joe on the street (in my experience) ...those who don't get offended quickly and leave.
Very few people who have not lived on the both sides of the Atlantic for an extended period of time, have any idea how different the US and UK are -the commonality in language lures us into a false sense of security. But they are very different and I regularly find myself thinking "oh, I wonder if the Brits will understand that?" (usually, not as in understand the words literally, but more the context behind them).
it's not necessarily a bad thing -it's not like it's an Americans-only thing, but yes, it's very American. There are many types of "very American" --huge place as this is-- this is just one type. A good type. (in the main
)
The difference becomes most obvious in the politics forum, which is more that a little incredibly American. Only Dana is brave enough to face that time and time again. Most of the rest of us furriners are too scared of the "friendly fire"