"P" makes a point. For DTV DVRs, the decoded signal bypasses the HDD directly after a channel change and is routed straight to the output channel (the signal actually goes to both, but the user sees it live). This is a clever way of shortening channel acquisition time, which became somewhat longer once MPEG4 began to be used (it eliminates the write/read delay of the buffer). Only when you use trick play features does the signal route through the HDD, and the switch is seamless. This is such a good idea I would have assumed that DISH was doing it too. Are they not?