If everything runs through my AVR into HDMI-1 on my Panasonic GT50, do I need to have my Harmony activities select HDMI-1 on the TV? Would it be faster if I skip that step? Surely the TV will always go to HDMI-1 as I have disabled the others... 

That's what I do at the moment . But Harmony had the option to not set input (remove that command). I was wondering if it might speed up the action, seen as everything is on hdmi 1 there's no need to "change" to it.