Hi guys! ...
Rob, my 1994 WP does the same thing. Were they still calling it a "Super Wash" in 2002.
Will, the older GE's have 18 minute washes, and I think I've seen it elsewhere, maybe the Frigidaire1-18. Other members will know. My GE is a late 70's model.
Bobby, one of Robert's DVD's feature what I think is called the Franklin Pig, a machine that both uses a ton of water in the rinse, and splashes out a ton in overflow during the wash, requiring more water to be added. Haven't seen the flick, but there have been many discussions. Think it was sold by Wester Auto and my have been a cousin to the Norge.
Will, in the 50's many machines had a standard 10 minute wash. Frigidaires, Maytags, etc. the KM/WP's had 12. Then the wash tines started getting longer. Like you, I think it had to do designer preference. There was some research from CU, on optimal washing time, but my memory is murky there. Of interest is that many coin-ops wash for only 6 minutes. Maybe you should start a thread. Cool stuff will surface from the club's collective knowledge.