Sure, I get that. What I was saying is, would it not potentially be better go give the founders some time to give their thoughts in the order they have them in...
before starting to go off on tangents and probe specific areas? Especially considering that the question you're about to ask, may be something they're going to be answering anyway.
I guess that if pg and crew believe that they learn something by intentionally knocking people out of their planned routine, then that's one argument for it. That is, if the idea is "we want to evaluate your ability to think on our feet, react to unplanned questions, etc." then OK.