Glass v.s. Plastic Toslink

To me, plastic sounds the best. I have tried many times multi-strands glass, and and the plastic always comes right back in my system because it sounds more coeherent, more balanced without edgy trebles.
Keep in mind that Toslink connections were conceived with a plastic monofilament of a certain aperture.
Glass never matches perfectly the correct aperture and the light gets bounced and reflected throughout the multi-strands for more jitter.
multi-strands glass in not used in medical equipment because the light in not precisely conducted..

Yes - I know... glass I have tried were the sonicwave and another one... ihave got to try the silflex then someday.

however, the red LED looks better, smoother, easier to look at at the end of the monster cable plastic monofilament than at the end of the 280 strands glass cable I have.
In theory, glass is better to conduct light, no doubt, but I bet that the strands within my audio cable are fractured because of bends and frictions. the length I use is 3ft. I have tried 2 glass toslink based on opinions, but plastic stays in.

I have read an interesting comment on the lifatec silflex website saying that the quality of Plastic Optical Fiber is so good that we are not giving up in performance using plastic over glass, especially over 3 feet!
In addition, the Toshiba opto electrical components were designed to be used with plastic fiber of a specific aperture.
By bundling many strands, you will not achieve the exact aperture of a single plastic optical fiber.
As one mentioned, a lot of it is how that cable is hooked up to the optical module.
I have to add that the DVD/CD transport I am using is a Yamaha S540, and I believe it was on the market probably around 2002. So it may not have the latest blu-ray ready opto electrical components that actually may be designed to work with glass fibers.