Jumper Cables - use the stock or should they be upgraded ?

Whilst we're on the subject, jumpers aside, different results may sometimes be obtained from connecting the single wires to the upper or lower set of binding posts.  Some do one upper and one lower.  It's worth a try.  

I just bought a Nordost Norse jumpers I have not try them, I used heimdall 2 on top n clear day on the bottom, for my diapason, they sound amazing, I moved the diapason farther, so the clear day are only 8 ft, I felt the Norse might equal or maybe better, I have to try first to know if indeed are better than clear day, I saw vertical Biwire go on Nordost web site, this might work, will see.

 Nordost norse jumpers are amazingly good, $90 used, I did vertical biwiring, as good as the clear day.they are on my diapason adamantes, the main sp cable is the heimdall....

We have to ask ourselves these questions:  Does a resistance of 0.0003 ohm worth fixing?  is there a SINGLE speaker manufacturer advocating changing the provided jumpers?

I can't answer @chrisr  question as a matter of science. I can say that the factory jumper cables that came with my Avantgarde Duos circa 2006-7 were quickly replaced with Cardas jumpers to match the rest of the speaker cable I used at the time, and when I went to a different speaker cable- K-S, the jumpers were part of the 'loom.' The initial upgrade from the stock jumper was significant; the subsequent change of cable more so, in my system.