As far as I remember, Git was already going strong at the time GitHub appeared. I was also a supporter of Mercurial at first, but I think Git won because: * it

As far as I remember, Git was already going strong at the time GitHub appeared. I was also a supporter of Mercurial at first, but I think Git won because: * it always was fast (written in C vs Python for Mercurial); * Linus and Linux are behind it.