The odds are unless Katzmaier took a whole mess of readings over a couple of days that the difference between new and now is well within the margin of error and Undecided's conclusion is correct.
That gap is so small, the instruments so barely designed to measure such a subtle difference, that it's very hard to really believe some programmatic change has occurred. More significantly, even if it had, good luck detecting it with your naked eye.
There is no difference in HDMI cables. If you can see the picture without visible dropouts or sparklies, the cable is working at 100%. No other cable will display a better version of that picture. You're simply wrong if you think there is a better digital cable than one that is already working.