Ok folks, let's clear it up:
Blackout: when a person experiences G-forces sufficient to drain the blood from the eyes, causing a loss of vision.
G-LOC: When a person experiences G-forces sufficient to drain enough blood from the brain to induce loss of consciousness.
There is no design requirement in the human body that these two events occur simultaneously. Indeed, were I the chief engineer on the human body project (and I'm just another lowly assembly-line worker) I'd give the brain a higher tolerance than the eyes (or any other organ for that matter). Hell, I'd even make damn sure the blood flow to the eyes failed before the brain.
As for the "Can't find the autopilot switch in the dark argument", take this thought experiment:
You're flying a WWII-era plane with a magic autopilot like the one we have. I don't want to know how or why, but you get disoriented in a sustained 6-G maneuver. You black out. You can't see a thing, your arm now feels like it weighs 100 pounds, but your life depends on you finding that autopilot switch.
I dunno about you, but 100 pounds is nothing when my life depends on it. And if there existed a magic autopilot, I'd make damn sure I knew where it was.