[Spivak]

Correct, but no part of the Linux kernel development is done on GitHub. It's nothing more than a republishing of the patch-based authoritative repository hosed somewhere else. The issue is that if you want GH to be your authoritative repository you're locked into GH's way of doing things -- which isn't necessarily bad, but a valid complaint is that you have to be a user of GH to contribute to projects hosted there.

[raverbashing]

> The issue is that if you want GH to be your authoritative repository you're locked into GH's way of doing things

You just push from your (private) authoritative repository to Github, and you're free from "GH's way of doing things"