Effective preachers can range from plodding to pacey. Contrary to popular opinion, slow is not always better. As long as people can hear (volume) clearly (annunciation), their brains can generally cope with pace. However, it is worth asking whether their hearts can cope?
Recently I had the joy of listening to a friend of mine preach in a setting designed for offering feedback. The message was very good. He did what many of us have done, though, and got confused about how long he had left. Thinking he should be finishing (although he could have preached longer), he increased the pace. Did we hear, understand and comprehend what he said at the faster pace? Yes. But did it have the same impact on our hearts? Probably not.
At times I have watched a TV show, or a film, at an increased pace. So for example, a 40-minute episode can be seen in 27-minutes. This saves time, and you still understand all that happens. But something is different. At 1.4x the normal speed it is possible to follow dialogue and action, but it is harder to feel it. When the moment of tension arrives, the intruder’s in the house, the music generates tension through it’s heartbeat style . . . well, at 1.4x the normal speed you simply don’t feel the tension, or the fear, or the anticipation, or the joy, etc.
We don’t have to preach slow, there is benefit in using a range of pace. But recognize that rushed delivery undermines the affective impact of the message. Is it worth trading that in for the benefit of cramming in more information? I suppose it depends on whether you think humans are purely brain-driven, or if the heart has a role to play.