Got mine installed today. This was the installers first install of a wireless client and it took him over an hour. He had to keep calling for support. Seems that he was doing something out of sequence that caused a problem. Once he got it going it does seem a little slow to respond. Seems there is several seconds delay after you push a button on the remote. On the H44 unit itself it reacts as soon as you hit the button. Very fast. I asked the installer and he said he noticed on the wired genie's that he has installed responded the same way, a slight pause.
You would think that the response should be just as fast as the primary unit as it seems the Genie with clients is the way Directv seems to want to do future installations. I see on the relocation package they are offering a free Genie DVR so they seem to be pushing them.