Mac & AFH, I was talking more about video glitches and the tinny sounding audio. Oftentimes, we head for the bedroom during the last commercial and finish the program in SD there. I generally still record them, so I'll try to remember to check the last couple of minutes to see the switch to SD. I have no reason not to believe that is the case, I'd just like to see how often if happens.
Also, remember that we in Arizona are somewhat unique because there is not always (ever?) a separate Mountain feed and we live off recorded material. Other markets don't have that same problem and that may be why the switch to SD is not seen in those markets, etc., perhaps the timing is easier to match.
FWIW, I just checked my Blind Justice recording and, sure enough, 2 minutes out the old switcheroo to SD.