I'd be interested to know how other folk's experience with wireless is going? IOW, which boxes do you have wireless enabled on?
I also took some previous advice and power-cycled the slow-to-react-to-the-remote control boxes and it did seem to work for a couple of days. But it have to be a "pull the plug" power cycle, not just a "power-off using the remote" version. But after a few days it's back to taking 1-5 seconds to "wake up" to a button push. And you have to be interested/patient to actually wait 5-to-6 seconds to see if it's just slow, or was an errant button push.
FYI, pings from two hard-wired PCs - one directly connected to the network box and another daisy-chained from a personal 8-port Gig-switch to the network box - have now been stable for 36+ hours. So that's good news.