OK, really frustrated that this thread exists adn that there are not clear YES answers.
I have two TVs on the same floor, completely across the large open room from each other (way too far for HDMI + splitter) and was expecting the "join" was going to make the one that joined a slave and that you would see the same thing regardless of channel changing or whether the program being watched was off DVR. This is how we watch TV EVERY NIGHT. One TV is on kitchen bar counter and can be swivled so that the person in the kitchen can watch the same program as the dining/living room. So when one person gets up from the couch to get a drink or to cook we don't miss the show being watched and the other person does not have to pause or rewind to catch them up.
Are you telling me with the Hopper/Joey and multiple HDTVs I can't do the simple whole-house 622 watching I currently do with one HDTV and mutiple SDTVs via the RF modulator? And no I don't want to put in RF modulation in my planned Hopper/Joey setup - the whole point is to upgrade all the TVs to HD.