Running the Tap before Dishwasher
If you have a long pipe run, all this is really guaranteeing is adequate washing performance in the US where dishwashers seem to need 3hrs to heat 3 thimbles worth of water.
In our case here in Australia, where electricity costs about 25c/kWh, it represents a saving of about $16 annually, with water cost factored in. The cost of tap-running for the water is about $4 annually.
The electrical figure may be higher, I only calculated it based upon a cycle that does about a total of 30ºC raise in temperature over the entire cycle, for the Heavy cycle, I can expect to go further than double that figure if it were used everyday.
But in any case, it is disgusting having only a single rinse. If you open the dishwasher during this phase, you will still see soap-suds in the water. This, then a rinsing agent is added into the water, making your plates unclean and certainly unrinsed. And just imagine, you are EATING all this residual compounds. It isn't healthy!
Whilst the documentation for the DishDrawer does not indicate, both the Delicate and Heavy cycles run three rinses post-wash. I only use these cycles, as I want well-rinsed plates, not "poison-plates," as you might put it.
There is little use in making a cycle simply to satisfy energy requirements, when it requires the user to re-wash/rinse all the plates following the cycle. Why not ensure the machine meets requirements for washing AND rinsing, while saving resources at the same time?