Our home's water is supplied by a well on the property. Rather than trying to calculate how much water I've saved, I'd rather know how many hours of well pump run time I've saved. With no water restrictions and a good supply (knock on wood) the water saved part doesn't mean much to me. However... knowing that my well pump didn't have to run X hours due to intelligence determining a schedule does not need to be run is feel-good factor.
Though.... I'd rather the well pump delay be introduced before this. Hint hint.