You focus on a very specific type of soil that Technology Connection didn't even mention, and isn't even relevant for a typical wash.

But that's a primary issue with TC's tests: it doesn't consider corner cases like this or water hardness. Consumers want it to "just work" and are not going to use a specific settings based on the contents of their dinner.

Sure, it helps the prewash remove fats. But if the main wash and the rinse aid get rid of all that regardless, then it doesn't really matter.