I think they're definitely loosing their grip, slowly. I think people's perception of the GB's elevated spiritual authority is dangling by a thread. But I don't think the GB's perception of themselves has changed one iota. Example: Tony's recent OBEY video.
I was pondering this just yesterday. I can foresee COs or groups of elders begin to question the GB and demand answers for all the mess going on (particularly money matters). Eventually the GB will be backed into a corner with no defense. They will come out swinging with all the elevated bluster they can manage, "HOW DARE you question Jehovah's authority!"