Please PM a graphical output or at least the test log for a two hour HD video stream on your LAN. I would be interested in seeing a WiFi stream of two hours where the data rate doesn't drop or slow down below 20 Mbs.
You don't need 20mbps for anything from Dish (or most anyone else). Dish streams average about 5mbps. It's variable bitrate, but I'd be surprised if even peak rates go above 8mbps. A good "g" connection should handle a single stream without any issue, a decent "n" net should handle a couple (or more) streams without real issue. OTA streams when available would be higher, but with subchannels being prolific I would be surprised if many OTA channels come close to 19.4mbs max.
I have fairly routinely had two wireless streams encoded at 12mbps going without any real issue. Can't say there has never been a glitch, but they are few and far between, and that's on a single band 2.4 n net.
If someone can't deal with an occasional drop or stutter, then wireless isn't for them. That doesn't mean it's not a valid option for many. It's a trade off for convenience.
I can see why Dish would not offically support wireless though, it opens up a huge support headache. Many reading this probably at least have a clue when it comes to networking, but the vast majority of general population users don't.
How long in seconds is the delay on the Hopper and Joey when you are watching live TV? Is the delay significantly longer when you are using WiFi vs RG6 or RG 59?
I'm wired with a HIC, but I did play around a little with wireless. There wasn't any discernable difference in the experience.