I mean that for the main line denominations i.e. Methodists, Episcopal, Presbyterian, Lutheran, Catholic and a good amount of Baptists to be a fully ordained minster you have to have an undergraduate degree then do Master of Divinity program. So, I think most mainline denominational minsters have been to college and even graduate school. Anyone can call themselves a Pastor and set up church so maybe the majority of Pastors in America are not well educated but large mainline denominations have educated clergy.