Honestly, I had the opposite response. I think the claim that Github is the most important social network is willfully ignorant of the role Facebook/Twitter plays in every industry beyond software development -- or, more accurately, the role Github doesn't play.
I agree. One of my good friends is a realtor. Facebook changed the way she does business. It is the source of 80+ percent of her leads and is, quite frankly, the MOST important social network to her.
Github may be the most important social network for a certain class of open source developer, but the author's attempt to extend its importance to demographics beyond this group makes the author sounds as if they're just trying to stake a claim as an early member of a new "cool" social network.
