How the information was disseminated and to who is a red herring.
Technical information was published publicly. No matter how esoteric and incomprehensible it was or how small of an audience it received it was out there and the ONLY way you could argue this is a genuine mistake (in that it remained uncorrected until now) is if the people who inside nvidia who knew the actual capabilities never saw this published public information. I find the idea that their team, who knew it was false, didn't see this published information to be nearly impossible.
And once you draw the conclusion that there is no way this information wasn't seen by people with the knowledge to know it was false the only conclusion that you can draw is that the decision was made to deliberately ignore that it's false.
As you say, it's so esoteric of information that for the most part it's irrelevant until you realize they lied about it and did so deliberately (at least by not correcting it). I have difficulty reconciling the idea that this information was so irrelevant when they had to know it was wrong (at the very least after publication someone in nvidia would have saw it) and then still didn't bother to correct it. If the information had been as irrelevant as you claim then such a correction to issued to the sites that published the wrong information would have been a non-event that no one would have cared about. So why not issue the correction?
My problem isn't with the information, this is a legitimate compromise in the design of a cheaper part. My problem is with the deception. I believe with certainty that someone with knowledge at nvidia saw the wrong information and communicated to those in charge that it was wrong, yet nothing was done and that information has been live until someone validated it as false with benchmarks.