The change in the definition of 'generation' is the first major doctrinal change in the time i has been involved with the jehovahs witnesses (allmost a full year!), and i personally find it pretty exciting since many hear has talked about how the other changes (like the 95 one) caused the first weak WTF moments.
What i wonder about now is how (if?) one should discuss this topic with active jehovahs witnesses for maximal effect - so to our resident mind-control gurus: What are your plans?
(just because its lame to ask these questions without providing ones own ideas: I think i would draw up the subject by asking a question on the old definition of generation and pretend i had not noticed the change. If i was not corrected that would mean the jehovahs witness has not noticed the change, and i would discuss the old generation definition even more, agreeing to all that was said.
If/when the new definition came up, i would act exited and curious, and assume the change must have been introduced with a lot of scholary details regarding translation details and deep biblical studies i would be exited to learn more about. When that turned out to be false, i would try to phrase the question if the change was motivated by the wrong definition being shown wrong because to much time has passed, or because of some genuine research)
Side question - I may be wrong, but to me it seems that this is the first time such an important change has been introduced in such a weak manner. The article does not even TRY to explain WHY they adopt this specific definition of generation. I must assume this lack-of-evidence is delibrate. Do you think this is a good or a bad thing?