Dolby Surround EX is not being used in broadcasts yet. It is a simple matter to include it at some point in the future, but for now we're helping the broadcasters to get on the air with 5.1, so we're going to lay off the EX stuff for now. There's no need to confuse the issue at this early stage.
Thank you for your considered response. I'd like to point out that comparing dts and DD soundtracks is quite a bit more complex than switching between tracks on a DVD. Ken Pohlmann wrote a very interesting article about this exact topic called "Dolby Digital vs dts...Which is better?" that is posted at http://www.soundandvisionmag.com/Sou...352_1,00.html.
There is also a link to the article on Dolby's web site at: http://www.dolby.com/pro/#guides.
It is important to realize that simply requiring more space does not make dts "better" than Dolby Digital. In fact, it is interesting to note that dts recently introduced an option whereby DVD authors can cut the dts data rate requirement in half (still more than twice Dolby Digital's data rate) by reducing the frequency response, leading a reasonable person to conclude that dts would jump at the chance to lower their data rate requirements if they could do so without seriously effecting the quality of their audio.
Dolby Digital is simply a more efficient coding algorithm, and that's not even getting into the cross-platform flexibility of the technology to be received and enjoyed in the home through the use of varied media.
Regarding our pals at DirecTV, I'm unaware of the problem you are describing, but if you'd like to contact me directly in more detail, I'll see what I can do to help get it straightened out.