I'm not sure what took GitHub so long to _finally_ implement a mobile view for the site, but thank you. I have been waiting for this to happen for years, quite literally.
Edit: It's worth noting I've heard plenty of counter arguments to using GitHub from my phone. But I will say, sometimes I want to check out a project and possibly browse source and lo and behold I'm not at my desktop. For this reason alone, a mobile GitHub makes sense. Glad to see it at long last.
Maybe it's a coincidence but this was a sticking point during a discussion between a couple folks at GitHub and Scott Hanselman on the HanselMinutes podcast episode aired on June 14th.
Secrets! We test things like that for quite some time before we release it. We know it's good when coworkers start asking, "Wait, this isn't shipped yet? Why not?!"
Even with the ability to CRUD files from the browser I don't think github would fit non dev audience with well. Most normal people use word processor or a spreadsheet program, those files aren't well suited for git and you can't edit them on github
Both the comment you replied and Github's blog post are about them making their website mobile-compatible. The fact that Bitbucket has a dozen unofficial mobile applications is not really relevant, and does not tell us anything about how "open" either of the two companies are.
Edit: It's worth noting I've heard plenty of counter arguments to using GitHub from my phone. But I will say, sometimes I want to check out a project and possibly browse source and lo and behold I'm not at my desktop. For this reason alone, a mobile GitHub makes sense. Glad to see it at long last.