According to someone internal the managers have been instructed to be very tight in their communication. Even those that have been told all along that they are the lead candidate have been kept in the dark since panels. This experience has been different from the beginning - everything takes so long. If you were told that you were strong, and were in a good position, then do not lose hope. Offers will be coming this week. I believe that HR just needs to put everything together before the hiring manager can communicate it to the candidate.
Everyone hang in there.