When one of the key guys behind the VCS says things like "especially when the alternative is something as broken as Git" about other control systems I really don't feel like using said tool.
This is a good reminder to me that I need to control my tongue as well; I have said things like the Pijul author did in that thread, and I need to do better.
Its not damning to call something broken, plenty of software has bugs that make it unusable and are broken to many people. In fact, many tools have been made in anger at other tools not doing what you want them to do. This is just the software inception cycle. You should be allowed to be angry at the brokenness of software... its what allows improvement.