Upgrading wall outlets

Ok, I'm not looking to start a flame war. But can someone tell me why the power from the plant to my house is going to be noticeably improved by an outlet? I have an open mind some please tell me.

Well, believe it or not. The premium outlet (like PS Audio's PowerPort) that I am using does make a big difference. In fact, it was one of the best upgrade I have ever made in my audio life. I am not an engineer. I can't explain why. The premium outlet has better metal and it also allows very tight grip on the power cord. That may explain the sound improvement.

I used the FIM in place of a "Hospital Grade" receptacle on my two dedicated lines, I was expecting a possible slight improvement but it was a considerable one. By "Logic" no power cord or other change you make should produce a difference given the distance the current travels before it gets to your house. But it makes a difference to my ears and there are explanations why this should be so; there are many threads on this topic.

I did not experience major sonic advances on a household shared circuit by upgrading to a Hubbel industrial or Leviton commercial, although there was definitely worthwhile improvement in either case.

However on a dedicated 30 amp circuit when I swapped the Hubbel for a Wattgate 381 (made by Leviton) the difference was fantastic, amazing, incredible, unbelievable! Best return on audio investment I ever made. It's hard to believe the difference realized for a measly $150, which is peanuts in this hobby.