I have two HR24s, and I have never experienced The Weather Channel response problem mentioned. Could it be your internet connection is slow?
My bedroom HR24 is without a doubt the absolute slowest of all my receivers, of which I have multiple HR20-700s, HR22s, and an HR21.I've cleared the NVRAM and everything else this forum has suggested via the many posts I've read, but that hasn't helped one bit. The IRD is even slower when I'm on The Weather Channel. I noticed that if I press "exit" on my remote, this tends to clear its "backlog" just a wee bit, freeing it up to do what it's supposed to do.