we'll he's onto something, but that doesn't mean you don't have to listen. The most active users are often several hundred percent more active than the average joe. In fact, there's no relevance of the "average" user because the the user pattern doesn't follow a bell curve, it's a power law. Check out http://www.extremedemocracy.com/chapters/Chapter%20Three-Shi... for some interesting math on many-to-many people networks.