If you go to the website to order satellite the default setup is wireless Gemini's but it also has this at the bottom of the page:Agree 300%
If you click the link to "Switch to a wired connection" it takes you here:
That photo appears to be a C61K which can only be wired. So I am not surprised DIRECTV is instructing CSR's to push wireless Gemini's to new customers but apparently you can still get a wired setup if you work at it.