I think those Bernice and Paul people are ringers - by my quick count, in their first recorded year (1966) they put up 106.5 GALLONS of stuff.

If you're going to do it right, according to my observations of my mother, the last step is, while cleaning up, to swear that you will never, ever ever do this again, and those in earshot should not ever even suggest that you do so. It was usually (always, maybe even) jam/jelly, though, and it could be that the excessive amounts of sticky involved are what really prompted this.