I have to say I wasn't pleased with the choice of Cylons. Normally when a mystery does the "big reveal" the audience is supposed to whap their foreheads and say, "Ah, of course..." But in fact there were workable clues only for Chief Tyrol, whose role with the Temple marked him as certainly linked to the F5 if not a member. I expected an older F5 but there was no particular clue in the show to make it Tigh. So far I suspect they didn't plan too far in advance whom they would make be Cylons. I also expected they would not be deep sleeper agents and was wrong about that.

As for the rest -- whether all the humans are artificial -- that we'll have to wait a year to learn.