I went from new <400 miles, Jagwire to Yokozuna and noticed a slight improvement. The shifter housing on the Yokozuna look the same as any other shifter housing. They say they are jet-lubed... but when I shoved the cable through I was expecting to see some lube come out.... there was something in there,.... but whatever lube is in there... is really light.

The Yokozuna brake cables.... they are stiff (as everyone knows) and I felt a slight improvment on lever action.... and a more pronounced improvement on brake stiffness.

I got a set of Yokozuna when PBK had the 15% off sale.... I can say new for new, well setup standard die-drawn cables (like Jagwire) work very well. If your housing ends are ground properly, the internal liners expanded properly, and the brake cables ground flat and perpendicular you can get really good performance from standard cables.

I was a shop wrench for years and actually like changing cables. I am of the opinion that you lube your cables and use wet-lube like Triflow on all my cables.

If I were to do it again, I would just opt to get Dura-Ace cables, Campy Cables, or the like and just replace them more often. Die-drawn cables (the process of flattening/smoothing out the outer surface of the cable) makes most current cables very slick. Campy and Shimano cables are tight wound and not die-drawn as far as I know.

For the $60 I spent on Yokozuna's I was not impressed by the slight increase in performance.

(All of this pertains to running cables on a 6700 group)