Power Cables and Affects on Timing (and speed)?

I stumbled across an interesting finding (by accident) due to an earlier oversight on my part.

I will post what specifically occurred below.

PLEASE, this is for folks who are in the camp that find cables make a difference.

Have you found / noticed changes (or not) in musical timing due to power cords? If so, can you elaborate?

Thank you.

[Note: I ran a few searches for Timing and cables and did not find a previous thread dealing directly with this topic. There are posts related to PRAT. If you know of a specific / dedicated thread, please post the link. Thanks!]