1) No, I don't work for Panasonic. I am a physicist with no connection to any commercial manufacturer. However, I have years of experience in the concept, design, development, fabrication, and maintenance of high tech aerospace electronic devices.
2) I have never denied any issues having to do with Panasonic plasmas. I believe in numbers -- and only numbers that can be reproduced. I do not pay attention to hearsay and anecdotal evidence. In the case being discussed in this thread, we have essentially one set of numbers showing an increase in black level and another set of numbers showing no change. At this moment, I stand unconvinced because of possible anomalies -- just like the infamous 50X1 "diagonal line" issue which turned out to be an extremely insignificant matter seen on a handful of sets by a handful of owners -- and one reviewer who overreacted.
3) I am not devoted to Panasonic. I have never even mentioned the name of a competing company to Panasonic. It's not what I do. I discuss only Panasonic models since I know only about Panasonic plasma TVs from years of calibrating them. (I used to calibrate RCA studio monitors and Sony XBR CRT sets for my lab work but that was many years ago.)
And since you have made this very personal, why are you so negative about Panasonic? You and a handful of others keep saying there is something wrong with your Panasonic TVs but you refuse to present any numbers. Do you perhaps work for a competing company?