I agree Dorayakii, some will never leave...and I don't believe the WT will go away completely anytime soon.
But, these things do sometimes have a cumulative effect. While many are still attending, among these are those who are still inwardly reeling from the recent revelations (i.e. UN, child molestation, generation change), and those who are leery about the recent education stance. JWs are about pretense,...pretense that everything is fine in paradise. But there is only so much that any ethical or thinking person can take.
If this is major, it might just be more than the needle that is needed to break the camel's back.
Axelspeed