Interesting discussion on briefings. I tend to tune out fairly quickly if the other bloke or bloke-ess is droning on. Briefings lose their effectiveness very quickly if they're too verbose, and in my experience the people who do the longest briefs tend to miss out the bits which are actually important.
As an aside, a colleague (to prove people weren't listening to briefs) once said "At the end of the runway I will ask for both FACs off, pull into a vertical climb and perform a flick roll off the top of the loop." It didn't register with the FO.