To paraphrase Leonard Nimoy from the Simpsons [1]:
The following article is true and by "true" I mean "false". It's all lies but they're entertaining lies and in the end isn't that the real truth? The answer is "no".
We geeks seem to often be susceptible to hype and hyperbole. Someone is really in love with Github and thinks it's the greatest thing ever and it's going to change the world. It's easy to get caught up in your own excitement. I get it. That's fine.
But I have to admit to having some Github fatigue. We've gone through a spate in the last year of "Github is the new resume", "Github will change engineer recruiting" and now "Github is the most important social network ever".
In many cases I don't believe the author is being deliberately "linkbaity" but that's ultimately what it is.
Part of the problem too is that you get a certain about of "bubble thinking" in tech circles. You see this when VCs get excited about Quora thinking it's going to be the Next Big Thing [tm] because "everyone" is using it (meaning "lots of other people in the Valley"). That's what I mean by "bubble".
I play boardgames a lot and it's much like "groupthink" there (an isolated group of players will evolve a play style and view on strategy very different from other such groups).
In all of the above cases the cure is just to get out of the bubble and expose yourself to different influences and views because the end of the road for this kind of thinking is simply stagnation and becoming out of touch.
Github is great. Their engineers are great. Source control is important. Some will be able to use it to demonstrate their work ([2] really resonates with me). All of this is true but let's not go overboard.
[1]: http://www.imdb.com/title/tt0701263/quotes?qt=qt0332688
[2]: http://news.ycombinator.com/item?id=4244420