Assume that the people you are jumping with are competent, even if you do not know them or the last time you jumped with them they were a geek. People do acquire new skills over the years, so your previous experience with them may not reflect their current abilities or experience. Once the organizers ask for your attention, keep quiet. It is difficult for organizers to compete with aircraft noise, PA announcements and other people talking. Ask questions at the appropriate time.
Most organizers have a method to their madness.
If they are explaining a build sequence and you ask a question about climb out order, then it upsets the flow of the dirt dive. They explain the dive in the order it happens, just as your jumpmasters did when you where on student status. If the dirt dive is about to break up and an important topic was not covered, by all means jump in and bring it to their attention. One of these people MUST be in the base. Know what their rigs and jumpsuits look like.