It happened: A female Allen’s Hummingbird actually fed from the feeder I put out a couple weeks ago. I don’t know for sure that this was her first visit (having long since given up my tortuous vigil), but I think it was. I happened to be at the kitchen sink first thing in the morning when she flew up to the feeder, briefly hovered a couple inches away, then landed and took a sip. She flew off quickly, but later I caught her just sitting there, possibly having sated herself already. This time she stayed long enough for me to take a few of my trademark, barely recognizable iPhone + binocular photos.
She seemed to like the way the world looked from there. Insofar as a creature with a pea-sized brain can “like” something.
Anyway, there you have it: I win! I successfully gave food to a hummingbird. Meanwhile, I wasn't just sitting around waiting for her to show up - I started offering seeds for the local finches and sparrows. Stay tuned for that story, which is gonna be off the hook.