From what I am gathering so far, my understanding is with the exception of that FAKE "high quality" brand TYG02 & 16X Verbatim+R, all my other TYG02 & 8X Verbatim MCC scans are considered within the spec, and although within the spec the quality is sub-par.
Just out of curiosity, I just tested a burn with 4X on TYG02 and wow the result is actually WORSE burning at slower speed. I remember reading suggestions on this forum to burn -R media at its rated speed and not slower because slow does not necessary mean better burn and now I know what you mean.
I'll be testing firewire later tonight and post my result. And if the result is still bad then I guess I'll have to deal with returns.... But do you think I should order a small supply of +R TY to test out and see if it would do better? So far all my burns on TY have been -R.