I didn't check out "Life with Jim". I lucked out even flipping to WAAY when I did (after "House"). Like I said, it was only HD for a few seconds so I couldn't really get a good look at it. Since Lost is on tonight, that'll be a good measuring stick. At 15Mbps, it should be enough for 720p, though I don't know what kind of encoder they have.
btw, just remotely checked signal levels, they look a lot better now than they did last night.
Currently testing 3D with Sammy DLP, shutter glasses, and HTPC