jrockway bromidically responded to a throwaway joke that in itself already acknowledged the content of the response.
I don't think I've ever heard anyone speak in support of TDD say that the code is fine if the tests pass. The canonical process of TDD explicitly calls for refactoring after the tests pass. That step is crucial and lasts as long as it takes for the programmer to be satisfied with the code (e.g. 8 hours).
I also found no evidence in the article that there was TDD involved. Perhaps I've misunderstood either the article or your comment. If that is the case I'd gladly retract my criticism.