I can be changing channels,browsing the guide,or just trying to pause a recording i'm watching and it takes awhile for the receiver to respond to the remote. I would say it takes about 5- 10 seconds to respond each time. hard reset does not help.
i don't watch ota on my 612. but, i do on my 722. i pressed the guide button last night and i counted to 8 before it responded.I don't believe it is a software problem, at least not like the 722 one is. I only have seen this a couple of times on my 612's and each time unplugging the EHD and rebooting fixed it. It is about a 2 sec delay for me. Someone at the other site also said they have a slow internet connection at times and that caused a lag..... I don't think it can be a software problem because there have been but a couple of posts about it.
One other thing if you using OTA channels make sure they are not on either tuner. Another words, after watching one, go to two satellite channels, or be very sure if left on an OTA channels it has a good signal.
i swapped my second 722 for the 612 after that. so, i wouldn't know. it could be that though.I could be wrong but I noticed the slower responses on the 612 after the last update from blockbuster movie pass to blockbuster@home