I'm not going to defend them, but even GN made a point about the possibility of having sent in a cherry picked (more insidious) or Golden Sample (dumb luck) in for original grade testing.
The Seasonic TX700 and the Silverstone NJ700 is supposed to be the same unit by all intents and purposes, but the Cybenetics report between them has the Seasonic as Titanium efficiency, whilst the Silverstone was only a Silver efficiency on one of the reports. But they gave totally different results during their testing there by Cybentics. So stuff like that can happen.
But in all honesty, I'm just glad we're not hearing about another Gigabyte right now.