Joe-- The amount of detergent dispensed depends on several factors including water hardness, load size, cycle selection, and soil level selection. So yes, if you choose light soil, for instance, less detergent is used than if you choose medium or extra heavy soil. It's a fairly smart system and has hit the target correctly for every load I've thrown at it.
Pierre-- Sorry, but I have no plans to make videos of the washer. I wash queen-size comforters in it all the time using the Bedding cycle. The 4.5 cubic foot tub is large enough to allow large comforters room to tumble and flex.
As mentioned, you'd probably be impressed with how the Cold Wash cycle works since you do a lot of loads in cold water. It does a great job and I'm using it more often than I thought I would.
The Sanitize and Cold Wash cycles are available on all four machines in Maytag's Maxima line---model 8100 (which is the one I have), 7100, 5100, and 3100.