hospital grade or commercial grade receptacles ?

Darrylhifi, the answer is, your electrician is not mentally restricted by a degree in Physics. He is able to consider the fact that something that cannot be measured can be heard.

Irvrobinson, as for me being "duped" by comparisons, it must be a ten year hallucination and affecting tens of dozens of people who visit here. I am truly frustrated by your ignorance.

Albert....I myself have been transfixed by your presence at various audio shows. It's gotta be the cryo.

Albertporter...The notion that a degree in physics inhibits thought takes the cake.

Irvrobinson,
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Simply put - cryoing does make a difference and that difference varies depending on the item involved (cables, CD's interconnects, Power Cords, etc.).
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I have done double blind A/B studies (repeated over a two week period) that absolutely proves to me that cryoing works and it is a significant improvement.
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It matters not that you can't measure it with a meter. It matters that two people can hear and appreciate the difference during double blinded studies.
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Albert - Hello to you - keep on cyoing outlets and selling them to grateful audiogoners - you are a pleasure to have amongst us.
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The issue in this thread is that some people have been asserting that there are differences between power cords and outlets because they claim to hear them. And there are other people, like Iverobinson, that are assume the differences they hear are due to their imagination because there cannot be any. So it does come down to dueling assertions. I believe mine has much more standing because 1. the placebo effect has limited applicability, and 2. 120v/60Hz electrical signal measures, even were they taken, fail to capture all that is happening along ac wires. They would rather believe their limited understanding of science than their own ears and live with the ever present fear that they may be taken in by a con.