Oh absolutely. I've done my fair share of "pure" TDD, but my style has evolved over the years to not always favor a pure approach (usually in the interest of time).

It really comes down to the nature of the problem - if I foresee a chance that the final architecture is not immediately obvious, I'll start breaking down the problem into small pieces and TDD the units, then the integrations.

I guess I'm of the opinion that not everything needs TDD, but everything does need diligence - my code after doing years of TDD has improved drastically, whether or not it was strictly test driven. Merely considering whether it will be easy to reliably test the code improves it, IME.