I'd trust the numbers from a calibrator more, as long as that calibrator has been taking measurements of the same panel, and can identify what fw made the change.
for all we know these panels just dim over time, or the 2014 models aren't made identical. what I want to see is a measurement made pre fw update, and post fw update with minimal time in between.
Displays: Samsung PN64F8500/JVC X35
AVR: Pioneer VSX-1018AH, 5.1 audio
Sources: HTPC(Mediabrowser), PS3, XBOX360, Wii, Sony DVP-CX995V
Control: Harmony One