Francksoy, I’m not gonna quote your whole post to say that I agree with it, but I agree with almost everything you just wrote.
The one thing I don’t agree with is that you list Jitter as excepted from the general rule (measurements being subjective). In my experience Jitter is also measured subjectively and depends very much on the drive used for scanning.
My opinion on the Quality Score is that people want it to mean something more than it merits, and that trying to calculate a single quality number from a PIE/PIF/POF scan is in general a futile task, because then you’re trying to leave all the “thinking” to a program, and one that only sees some small part of hw the disc behaves (e.g. only one drive and one speed).
Quality Scores are pretty much as objective as the movie or album ratings you can read in newspapers or on the 'net - it’s only the opinion of one single program/person that only has a limited perspective and which may not share the same view of what’s important as you do yourself.
My suggestion to people who use the Quality Score for determing whether a burn is good or not: Please stop trying to make the scanning program do the “thinking” for you, and realize that human judgement must be used to get a meaningful result.
And BTW no Disc Quality Scan is complete without a Read Transfer test or other real reading test to verify actual readability of the disc; Quality Scans as a general rule cannot tell you that important piece of information, and problems that won’t be detected by quality scans are sometimes easy to spot with a Read Transfer test.