Quite possible. But I've followed this vendor by far the longest of any of the Chinese and my gut is telling me this was deliberate.
Given the past backlash that came last time this was discovered, maybe they just realized it's better to be up front about this stuff. To be clear I'm absolutely not suggesting QSC is in anyway trustworthy or more honest than any other vendor. But given their huge customer base and large number of independent tests, i think they gradually realized there are some things they just won't be able to get away with and stopped trying.