It's an average, or a median -- and of course, there are very few *truly* average people. But there's still a lot to study about how groups work when you have an increasing part of contact with people online through one forum or another.

Yes. I'm just not at all certain that the Dunbar number should be used in a lot of the ways that it is. It reminds me a lot of the confusion between IQ and actual talents for doing things...the wrong yardstick applied to the wrong things.