Rowland PC-1 question: Power cord differences?

With Power Factor Correction (PFC), it seems logical to me that power cord sound signatures becomes irrelevant. However, I have found that the audio world often has its own non-intuitive logic.
So- Is it true that a power cord quality becomes irrelevent with PC-1/PFC, or have users heard audible differences when power cords are changed?

I'll also contact Jeff to see if he will respond with his experiences & thoughts. Most curious...