I think, and I'm not really sure how you're going to factor that in, if at all, aside from using the known quality of components, but it seems like ripple is your PRIMARY tiering factor and I think that skews things tremendously. I'm not going to point to any specific units, but we already know there have historically been quite a few models/series that had good or at least passable ripple etc. on initial reviews but degraded to much worse or even failure levels after a season or two. So poor longevity because the components were not high quality and can't hold up until extended or continous or frequent demand.
It makes no sense to put a unit in tier 1 because it has great ripple, if you know that because of the capacitors or other internal components, or lack of a sufficient cooling profile, that is isn't going to be getting that same result if it is retested in six months to a year after being hammered for a while. And we have seen a number of units like that in the past. I'm sure it's not just a historical precedent either. Again, not sure exactly how to fix that, but I think it should be a factor and when somebody like Jon is telling you that a unit contains crap, regardless that it tests well initially, I think that's something you have to at least figure out a way to incorporate to some degree or other.