Great thread everyone! I tried the que-rush on some duel maps against Mansu Musa and Roosevelt, and easily racked up my first two emporer-level wins (although it does feel a bit cheap

).
Essentially, I built only que and sent them out to find the enemy. I did not delay much in declaring war -- only enough to try for position to grab a free worker. In one of the games, there was an iron resource one tile away from the enemy's capital, so I had to scare that worker back into the capital immediately, rather than try to capture it.
By the time I was pillaging the few improvements I'd find with the first que, I had a few more almost there, and then I just fortified them in forests next to or near the enemy capital. For some odd reason, the AI would attack these concentrations with a single unit every 5 turns or so, so I got lots of good promotions. In both games, the AI tried sending out a settler w/ 2 archers (or the Malinese UU), but with 2 stacks of 5 ques, this essentially just gave me a free worker.
With the worker, I chopped a settler out of my capital (I researched mining->bronze working), and secured bronze or iron with my second city. The AI was completely helpless, although attacking the capital was not a sure-win until I had a massive army of swords and axes. I don't think that having 2-3 times as many que as defending archers is quite enough to take a large hilltop city.
Anyway, the AI is defintely not playing well in this type of scenario, although I'm not sure what I'd do to counter. The strategy failed misearably on deity level, since the AI instantly has two cities, with something like 4 archers in each. I'll keep trying though...