I think, it is System depending, some Designs react more, some less. I listened to Nordost ODIN power cords and I heard no improvement (with Lamm Tube amps) which justified their pricing.
Nordost Valhalla Power Cords
.....a question directed to the owners as well as the past owners of these power cords. We do not need to get in - what will it be going on, what are the room dimensions, what music do you listen to etc, etc, etc. Just your thoughts on these power cords...as I have mine and just want to see / hear what you think.