Does power cord length matter?

I'm not an expert on the subject, but before I bought a recent mamba power cord I did some reserch and found that a power cord should be 6ft(2 meter) from what I could tell is that is how long it takes for a cord to filter out any noise or rectify any problems that maybe coming out from your outlet.

I read that under 3 feet is not recommended by any company, and that 4 feet is usually o k by many companies. Not all cable companies adhere to the same policies on length. If you are going to have too much excess cables and cords that are all entangled then this is counter productive to the sound as well.Power cords ,interconnects and speaker cables should be separated from each other and from each type ,as best as possible.

Briweve, That is a reasonable explanation. I would like more info and data to be certain. Thanks Lihifiguy.