I don't know exactly what makes a programmer an Agilist, but the straw man just got a thorough beating.
It sounds like the presentation Cedric saw was over the top. That's too bad--I've seen some smart people do a good job demoing TDD with examples like the Stack example Cedric mentions. I even sneak it into talks myself sometimes. (Admittedly the examples are toys, but usually the presenter is able to go off script and explore more serious examples.) I hope the people at the presentation Cedric mentions get some other, more even-handed exposure to TDD.