Well, that sucked.
I was going to get about 720 AD, but no one (including me) got Fission on the interturn, and I let my hoover's prebuild finish (I thought I could get into the interturn and do something, but I was wrong), so I had to put sparta (building palace) into disorder and figure out how to get Fission in as few turns as possible - had to dump the market and pillage a wines tile.
Got research to the point where I could win in 760 AD... but an automated worker reconnected the wines, so sparta finished the palace, so I had no prebuild that would finish before 850 AD or so. *sigh*
No question that 770 AD can be beaten - I got theology for my free MA tech (nice!), but no one got engineering. AI got banking for me, but nothing in the IA, and I got industrialization - so, had my game had better luck, I would have been able to get a mid 600's AD game.
I think it was a mistake to have babylon and not byzantium, russia and sumeria.