Looks like you are the only one of such "crazy" and cannot see obvious difference. I did measure one of the SD parameters on DTV muxes: a resolution, it was 352x480 max ( just for clear understanding - analog NTSC format is 740x525, its digital copy is 704x480 ), perhaps last time it become 240x480 (?); if you will add to that very limited bitrate allowed to SD channels ... You will get the current worst whatsoever picture quality. Just unwatchable ! And we all remember first 10 years of perfect SD PQ, before HD become a main trend and eat all bandwidth. Could you imagine raising a volume of weep cream would make whole milk down to 1/2 or 1/4 of vital components while it will be selling as WHOLE MILK !