I would love to see a link to any article, citation, etc that supports that claim.
Only comment I have seen from Sage in regards to nameplates is that they removed them because they couldn't get them to look right (or something to that effect). He also said they were open to putting them back in to the game at a later date if whatever the problem with them was resolved.
I've followed politics long enough to recognize a half-truth when I see one. Nameplates are such a staple of MMOs that there has to be a legit technical reason for taking them out. To this day Brian Wheeler has not been able to figure out why Cyrodil continues to be plagued by intermittent lag spikes. Some players are reporting Blue Screen of Death crashes in Cyrodil and blame a memory leak for the crash. In the last patch they removed all the fluff critters in Cyrodil that are only there for aesthetic purposes to see if that improved performance.
If I had to bet a six-pack of beer on the real reason nameplates were removed, my bet is because they degraded performance in Cyrodil when there were a lot of players in the same area.