Tim,
Having marched under two flags in the past, it has more to do with the complexion of the panel than whatever dogmatic evaluation "system" is employed to reach their respective entirely subjective stratification.
All have their strong and weak points, except GM . . . . where the panel is Ran and a bunch of famous dribs would not know a hidden gem if it jumped in their pants and bit their dick.
It would be far easier to take them seriously if Ran simply penciled out his evaluations every couple years and Bryant Gumbel stuck to . . . . well, whatever he is good at. I don't know what that is, but I think the same thing about Rees after playing Torrey South last week.
There is no right or wrong and personally, the concept of a "Top 10" and so on and so forth makes more sense these days.
The idea that in, say 2002, PB gets atop PV and then magically in 2004 the reverse is true strikes me as a bit like choosing which of your two perfect children you love more.
Take it for what it is . . . . I read the comments on the newer courses and ignore the rest, mostly because I am that one idiot who fills in the numbers (don't the nerds refer to it as "populating the field?) and then composes a lengthy treatise that almost always over-runs the available space.
I'm operating under the hallucination that somebody is reading my didactic analysis, but then again, the same could be true for the meandering "trains of thought with no caboose" that spew from my fingers on this board after a Margarita or two . . . . or three.