Not my epinephrine levels no, but RescueTime does let you know when you're working more productively than others I guess.
The horror stories here seem to be giant rooms full of inconsiderate loud frat boys.
My current office is 8-10 people, open plan, great inter-team communication, and a pleasant atmosphere....
As one of the developers who has a interruption surplus (get interrupted more than I interrupt others), I really dislike open offices, they actively prevent me from getting work done.