> Before looking it up just now, I could have sworn the point was something like "every developer has a door they can close", but oh well.

EDIT: Ok, my mistake, my memory is failing me. "Doors that close" is used in a whole bunch of Joel blog posts, and "walls and doors" is used in the original Joel Test description.

But WaybackMachine seems to confirm that the official label from the "Joel Test" has always been "quiet working conditions" and does not appear to have been changed.