Your question says it all.
You seem to think that the 80 PLUS GOLD certification is a rating of power supply quality when it is nothing of the sort.
There are PSUs on the market with an 80 PLUS Platinum certification that have an electrical performance (i.e. voltage regulation, noise, ripple, transient response), excluding efficiency, that aren't any better than some 80 PLUS Bronze certified PSUs.
It's an AC to DC conversion efficiency certification only, that is determined at an unrealistic 23°C ±5°C temperature.
Any test review that doesn't perform hot box testing isn't worth anything.
Also your
JonnyGuru: http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=167 link is a review for a completely different discontinued OCZ PSU model OCZ-Z850 made by Sirtec.
All three OCZ ZX models are made by Great Wall.
Your other post also mentioned the missing MOV in the transient filtering stage. This is one way of lowering the price.
I have never said that the OCZ-ZX850W isn't a good PSU.
I'm just pointing out that you seem to place a heavy emphasis on the 80 PLUS GOLD rating thinking that it is a rating of PSU quality when it isn't. You wouldn't be the only one that has been mislead by the 80 PLUS ratings either.