Just 10% of pastors with advanced degrees preach 40 minutes or more, while only 10% of pastors with bachelors or no college degree preach less than 20 minute sermons.
The difference is apparently more complicated than more education vs. less education. The article also indicates that mainline Protestants are more likely than evangelicals to preach less than 20 minutes, while pastors of "other ethnicities" apparently tend to preach longer than white pastors (they didn't say "white" but I assumed that was what they intended).
There may be a perception among some that the more educated are better speakers than the less educated. I have not found that to be a consistently correct in my experience. Some highly educated speakers are dry as Ezekiel's bones (and probably as brittle). You will pray that they don't go over 10 minutes, 5 would be better!
Good and bad speakers come in all shapes, sizes, colors, and levels of education. The shorter time among the more educated may be as much because that was what they were taught to do as anything else.
The clock can be the enemy of the pastor and the congregation. Some preachers who are done in five minutes think they must drone on another 20 or 25 minutes simply because that is the time slot they have been given. Some preachers who aren't finished slice off some important things they should say because the services must be over by noon. (And there are numerous variations besides these.)
