I think instead of making a comment, raise your hand and ask a question like, "if the GB is directed by holy spirit, why would the holy spirit say one thing years ago and then tell them a totally different thing now about this so-called new generation understanding? It's implied that the holy spirit was wrong at one point, and if not, then the GB is not truly inspired and are making this up on the fly. Which would be a sin against the spirit. The unforgivable sin."
They can't say that the light is getting brighter or clearer, because only an idiot would think that this new understanding is so.
Pull out a sandwich and start eating in the middle of the meeting.