I don't believe it about the actual Puritans, but the line's stayed around for a reason. There really are people who instinctively oppose pleasure. Look at the health nazis, who are closely connected with the people I talk about above.
Other than, perhaps, a few obsessed Nuns in some dungeon somewhere, I don't see it. The health people are idiots, but still they do it, because they don't want people to be hurt. Not saying it's a good enough reason, but it's not because they can't stand the thought of you enjoying a cheeseburger.