I'm a bit dumb about these things on text, but did you drop an "/s" somewhere? I understand it has sort of a social networking layer on top, but that is not its main function right? This would be like calling a calculator app a social networking app because it allows me to share my results :D.
GitHub has always branded itself as a "social collaboration platform" rather than anything else (well, first "git hosting" but secondly the social stuff).
Notice the logo says "Social code hosting" and the messaging of the page is mostly around popular repositories, collaborative features and other social elements.
