Since Katee said that this episode could have served as a series finale, it makes sense that the final cylon would be revealed. Oddly enough, this never occured to me. For the last several months, I've had it in my head that we wouldn't find out until the end or near the end because a few cast members said they didn't know who the last cylon was even while they were filming one of the last episodes.
We'll see. I have my guess as to who it is.