I'm not going to disagree that your bike is holding up wherever you live, but in my experience down here in New Orleans, it doesn't seem to be the case. I would literally have to lube the entirely of the bike, every last millimeter of it, to keep rust off. And then I'd have to wipe that off seemingly everyday because of all the crap in the road. The chain is one thing, but bolts, every surface, my shifter/brake assembly, all of this is subject to constant wet weather and doesn't get a chance to dry. It's not a little bit of water and then dry, sunny air. I don't have an opportunity at work to dry it off after a downpour so that it doesn't find a little exposed bit to oxidize.

I've lived in my current house for a year and a half now, with no inside storage, and I've seen my bikes deteriorate. I know they're outdoor machines, but steel is steel.