This is the biggest problem with the article - if you're using GitHub as a reason to argue that Git is bad, then you don't know enough about what Git really is to make that judgement.

The fact that Git is a DVCS has nothing to do with the fact that the Rails developers failed to fix a bug on their platform (Rails), which the service that you happen to use to host Git (GitHub) happens to use as well.

Sure, you could use this as an argument to switch to another Git hosting solution (BitBucket, self-hosted), but this could just as easily have happened with a SVN host using Rails....

There was not a rails bug! It is that way by design. Now, it is a terrible default but it was not a bug.