^ Nah, she just said she was a cylon - clearly and repeatedly. Specifically, she said she was Caprica Six, and she even "continued" a sexual relationship with Baltar. But then Downloaded happened and Head Six and Cap Six had always been two separate entities, which obviously makes that particular angel a damn dirty liar.
Also, Head Six in one first-season episode says to Baltar of Boomer that "her model is weak", the exact words used by a Six on Caprica when discussing the fake Sharon who has been assigned to seduce Helo. In the latter case it appears that the Six is concerned that Athena might be distracted by her emotions; in the former, Head Six associates conscience with egregious sentimentality, just as in Superman 2 where Ursa speculates that Supes protects the humans because he sees them as pets.
Didn't head six turn out to be an angel?...
Yes, Baltar's head Six and Caprica Six's Head Baltar both showed up in that final scene
They are the Joker and the Thief.
Baltar the Joker:
There must be some way out of here
Said the joker to the thief
There's too much confusion
I can't get no relief
Businessmen, they drink my wine
Plowmen dig my earth
None of them along the line
Know what any of it is worth
Six the Thief:
No reason to get excited
The thief, he kindly spoke
There are many here among us
Who feel that life is but a joke
But you and I, we've been through that
And this is not our fate
So let us not talk falsely now
The hour is getting late