Yes that's what I was implying. (I guess I wasn't clear enough.) If Bob Martin said something like that, and he couldn't list even _one_ case where TDD wasn't the best approach, I'd question whether he had fully thought out the problem.

Bob Martin has said exactly that, without any kind of qualification at all, on many occasions over the past year or two.

Then again, this is the same man who doesn't think there are any more kinds of programming language left to be invented.