With all respect, people are looking to upgrade after reaching the end of their two year contracts, and almost exactly two years ago, the GNex was the hot phone released on all carriers, including our beloved Verizon (I think it was a good device, for its time, especially GSM ones). It's not a shock at all that with the timing of the Moto X, that people who purchased the GNex would be looking at it. You're talking about a large group of power users and Android enthusiasts, after all, who wanted a more stock experience. So these are likely more dedicated fans who've looked at the competition and made informed decisions, but still need that real-world feedback to reinforce that decision. Otherwise, it would only make sense that more recent phones, like the HTC One and S4, have a smaller tech gap between them and the Moto X, simply by virtue of when they were released.
Just as well, the reverse can also be true of what you've said, in that when comparing the Moto X to current top Android devices, we can also question what the big deal is. In fact, many people try to defend their purchases, so for all we know, that could be the motivation behind their dismissal of any competing device,
especially the new kid on the block. Who knows? So I'd say for the most part, we're all pretty honest about what we're experiencing, and while perspective is important, we do have the necessary
objective details to balance out some of the sticker shock and "mid-range" talk which took place, before.