ExbethelitenowPIMA ... it could take 5 years for the Organization to tone down to become effectively different. However say you are personally bothered by a particular doctrine (say the literal interpretation of the 144,000), you might get relief a bit earlier. Even then, the best you could say to your friends would be ... "finally, I always knew that the 144,000 was a symbolic number."
However on a another thing that you mention previously ...
You know all those clandestine bible study groups we heard about, in the end they all collapsed. It was either through people leaving the Faith on their own accord, because they realized that nothing was going to change without the GB's say so ... or they got ratted out. Its just what has historically happened.