> the usual ~150 that I think studies show is max nearly everyone can maintain This is what you're thinking of: http://en.wikipedia.org/wiki/Dunbar%27s_number

> the usual ~150 that I think studies show is max nearly everyone can maintain This is what you're thinking of: http://en.wikipedia.org/wiki/Dunbar%27s_number http://en.wikipedia.org/wiki/Dunbar%27s_number