I would also expect that most of their comments and discussions are planned and / or rehearsed. Is that the case?
there are discussion points that are listed in pre-game meetings that get mentioned. The conversation is not rehearsed. ie they may decide to bring up the success of one team over the years at a position. Or more often or not what they do is relay what the coaches tell them in the friday meetings. The staff meets with the announcers on friday and tell them tidbits and keys to the game saturday and what to look for, as well as other little stats, and the crew re-iterates those during the games...often becoming the keys to the game.
The really good announcers put in alot of time analyzing a team through the week, the film etc. The ok ones or ones pressed for schedule/time...just rely alot on the friday meetings.
But most of the broadcast or all of it is not rehearsed other than opening comments....the talking points are jotted down and may or may not be discussed.
As an example...often you hear announcers say this is the spread option at GT. Paul tells them, look this is what it is...we run the triple, but its a version of the spread option...he emphasizes that with them on friday. TRUST ME, GT can help tweak the broadcast messaging.
When you get pompous announcers like pollack, who have the agenda to blatantly say you can't recruit to it, GT has to show me, the offense is a detriment....then it becomes really obvious who has the agendas and who doesn't.
For instance. Brock Huard....no agenda. Supported CPJ and GT with the messaging all broadcast. Same with Dave Archer and Tim Brando. Matt Millen loves our O. So does Charles Johnson.
Pollack. Not so much. Palmer. Not so much.
Herbstriet...a big fan...he would love to talk GT more...but we need to be 9-1 and on the radar...we never are...we screw it up for ourselves.