How many left when 'this generation' became double speak? I agree with those that say 607 and 1914 wouldn't make much difference to most believers because it's reached a point where their beliefs are now built around the society and the people who run it. JW theology is like a line of goods that can be dropped from their inventory when their shelf life is up.
What a believer really cares about is the JW life style and to be accepted into that life style you can not question......anything. So the society can sell them just about any new light. And that's TTATT in my opinion.