Maybe it would be best to add it as an option in the next version of Twitter Auth. That way it doesn't get mixed up with the other tweaks in this one. Better and easier to debug if there are any possible unforeseen conflicts or issues (unlikely, but better safe than sorry).
Adam - that's a really useful thing and also a great learning resource for both XF template modification and TMS. Thanks for posting this!
However, I'm having a hard time understanding how to implement such a thing in TMS. For example, doing a regular search/replace per your guide appears to require two template modification entries, and the way your modification works, it requires one of them to be saved with an open HTML/XML tag, which I think is freaking out TMS when I save it. Is there a discussion about how to make this modification with TMS that I'm missing?