Power cord length?


If I'm going to spring for an uber expensive cord-a 'final' purchase-say an MIT Oracle AC 2--is there any sonic benefit going to a 4 meter vs a std 2 meter? (I have absolutely no chance to audition). Technical details of 12 ft versus 6 ft power cord?
ptss
In the beginning Nordost sold only starting from 2 metres. After we tested a few 1 metre cabels I understood why.

But....beging commercial they started selling there powercabels also from 1 metre. How stuppid you can be.

The dynamics were better of the longer cables. Also the mid freq. had more boduf and sounded more natural.

In general a longer powercable is Always better in the lowest freq. When we gave a client a 1 metre and 1.5m version. Most of the time the bought the 1.5m version.
I suspect the only thing one could bank on and worth the worry is make it long enough to reach the outlet.
@ Mapman, Hi, As I said, I contacted Tara labs, their answer, does not make a difference in lenghth between 3ft that I have, 5ft,6ft, man, I was concerned there, as it turns out however, I do want to do test myself regarding this matter, maybe you could to, and tell me your findings.
Hi Mapman, I hope you are correct, one would also need to consider the make and model of the power cord in question, I have a 3ft Tara labs cobalt power cord, you can understand the reason for my post above, have you ever noticed a change in the sound with different lengths?, I may ask Tara labs concerning this, Happy listening.
I thought that the longer cables have more surface area to disperse/filter noise.