I don't think anyone said GitHub is "the one true way".I'm pretty sure the question was meant a bit more loosely, not as a direct challenge to someone's post here, but to the general prevalence of a meme that roughly fits that description. I certainly wouldn't suggest grepping for that phrase as a method of getting a feel for its virulence out "in the wild".
Instead, look or tacit assumptions, misattribution's of value, and conspicuous omission of alternatives. I guess good, old-fashioned "reading between the lines" is what I'm suggesting.
A pretty dramatic illustration popped up on my RSS reader this morning. Someone submitted a HN article with the title "Jeff Atwood's open source contributions", which was nothing but a link to http://github.com/codinghorror - which currently shows zero projects. It was quickly flagged here at HN, but it lives on over at Reddit.
http://news.ycombinator.com/item?id=1023696
The tacit assumption here is that if Jeff has zero repositories at GitHub, then he has made zero open source code contributions.
I don't mean to detract from how cool it is that your product is so successful. (Kudos!) But its fans often have a creepy blind spot to alternatives, in my opinion.