I've been curious how much impact they have had on our current culture; a people who (to paraphrase Robin Williams) were so uptight they got kicked out of England.

Christian mores definitely still drive our cultural mores, and while there is some easing of the restrictions there, sex is still much less acceptable than violence. As a simple example of this, attempts to reduce the violence in highschool football are as vehemently opposed as attempts to provide more than "abstinence only" sex-ed.