Missed the first few minutes, where it might have been explained, but the rules seemed different from past rules, it seemed to me, where both parties tried to interrupt the other at every possible point that the moderator wasn’t throwing a pail of ice water on him. In contrast, last night, I thought both men were restrained in (as opposed to restrained from) interrupting and fighting for time to speak.
At a guess, I’d say that Lehrer was operating under rules that said, basically, “Through the miracle of modern computers, we will monitor how many seconds you are talking, how many your opponent is talking, and at various points when one of you gets more than a few minutes ahead of your opponent, we’ll give him those few minutes. Each of you will get to talk for the same exact amount of time.”
How far off am I?