I interviewed with a company one time that ran with TDD and pairing like a religion.

The guy I was interviewing with didn't like the fact that I thought about how the problem might be shaped (and therefore made assumptions as to what I might want to implement and refine via tests) prior to “writing” that first failing test. It was absolute nonsense and I was rather shocked that the company managed to ship anything, to be honest.

I'm a big fan of tests; I'm a big fan of pairing. They are tools; nothing more.