Okay, so I guess it should be self-explanatory, I'll try not to add much commentary.
First, see this post's comments: http://stackoverflow.com/questions/4764573/why-is-typedreference-behind-the-scenes-its-so-fast-and-safe-almost-magical
Then see this post: http://meta.stackoverflow.com/questions/89488/what-is-considered-too-localized
(Sorry it's a little long.)