Had I been attentive to the question I may have proffered an answer closer to the mark. In this instance I was taking note. I take copious notes. I will even record where I can. Few others do. I don't trust my memory.
After a scintillating delay in which the question was put several times, to the room and those online, everything from 3 seconds to 'something under a minute' is suggested.
We are told that the average delay is 7 seconds.
We learn and are told that "Thinking takes time - that a considered response takes time".
We are told to use the silence, say nothing for 7 seconds and only then give them a nudge, offer a clue to the answer, but not the answer itself.