Well put, brotherdan.
I think there was a bit of a shake up when Ray Franz was disfellowshipped. A lot of Bethelites "saw the light" at that time and then his book caused a lot of witnesses to take blinders off and break away. That was huge!
Edited to add: Not to mention the Internet, Silentlambs and most recently, Barbara Anderson. Each on it's own may be considered a small ripple but if you get enough of them going you will eventually have a tidal wave.