The Normal cycle on my LG automatically engages the soil sensor to determine the length/number of water changes for the cycle. Fortunately, it often opts to shorten the cycle, and I never pre-rinse dishes. Only on very rare occasions has it lengthened it. The cycle time defaults to 2:19, but it's often done between 1:30 and 1:50, even when I add the steam and 160-degree final rinse options. Most often, it uses 4.5-5.5 gallons of water. If the load is small or very lightly soiled, it will use 3.5 gallons.
I'm guessing the ASKO also defaults to a soil sensor. The load Consumer Reports uses for their tests is, by their own admission, quite a tough, heavily-soiled load. The ASKO probably defaults to a longer cycle time with more changes of water. I checked again, and it states the ASKO used 7 gallons of water for their test cycle.
Miele: Two expensive new Miele dishwashers ranked at the very bottom of the ratings due to extremely poor cleaning results, partially the fault of wash arms that clogged during testing. CR says that Miele has come up with a 'fix' for the problem. They will undoubtedly retest the machines soon after they have been fixed.