I just thought I would post what I have found out (and done) to resolve my issues with the slow guide (and with IR commands in general). I posted above that this issue started a few days ago - and while that is true, I did not mention (since I did not think that this was related - but it was), that I also purchased a new LCD TV. My old Toshiba 36inch Tube died, and I replaced it with a new Vizio LCD. The issues started then, but I had thought it was my remote - which has some button issues - so I replaced it (Harmony 620) with a new Harmony One. As stated above, it (and the Dish IR Remote that came with the receiver) both had issues. I did a bit more research and found quite a number of folks that have had issues with the Dish receivers and LCD tv's. Apparently, the IR "noise" from these LCD tv's is interfering with the Dish remotes. On a number of the sites, I saw that one "fix" was to put a piece of paper (in my case I used a lime green sticky note) over the receiver IR port. I did this, and voila, the guide started working and all commands seemed to work fine as well. Apparently, this was the problem all along. Not sure if my sticky note solution will be the long term one, but for now - it seems to be working...
If you cover the IR port with anything
won't you also block those IR signals from your remote ?... or are you using RF instead?
As implausible as it sounded, I did your procedure on my 722k. As I expected, all
IR signals were blocked
Thinking that perhaps you meant to cover the IR port from LOS with my LG TV's IR signals, I place the paper over the top of the IR port, but left the port basically uncovered and in LOS of my DISH remote ... no changes noted.
So, for me it was a wash.