Stan, I have to beg to differ here. I do agree that general editing says to keep clips less than 5 seconds, but that is not the realm of event videographers. I cannot tell you how many corporations want a naturalized recording of their events, including every dry second of the presentations.
When I shoot those events, I run two cameras and sync their audio, cutting back and forth between cameras. This helps to keep the audience from viewing the same footage interminably, so to speak. If I had the motivation, I would introduce two or three more cameras to cut among many, like watching a football game.
The same holds true to mothers and daughters who want to listen to every millisecond of the wedding ceremony, even if it lasts over 30 minutes. That's just what they want.
So for me, I still would have to bring my camcorders along. When they get 60 minutes or unlimited tethered shooting on a DSLR, then I am absolutely all over it!
Scott Chapin Powder Springs, GA, USA Nikonians Team Member