For me, this is primarily a reflection of the quality of service and community on Github rather than any quality intrinsic to git. I prefer mercurial to git, but find myself using git significantly more as virtually every dependancy in the apps I build lives on github.
I do think however that there are lots of teams, particularly in enterprise, that are quietly and happily using mercurial.
I do think however that there are lots of teams, particularly in enterprise, that are quietly and happily using mercurial.