When I call DISH CS the computer tells me I have been identified as an AT&T customer and I am directed to a CSR who handles both AT&T and DISH accounts. S/he is familiar with what AT&T offers it's customers and what DISH offers its customers. If you look at the AT&T site you will notice that the equipment offerings are different and there are limits to the number of receivers, especially DVR's.
Let's settle this once and for all by using some common sense. Why would AT&T, Sprint, Embarq; et al hire and train CSRs to do what DISH CSRs can do already? It's just good business sense. AT&T offers its customers the convenience of having one bill and the opportunity to sell you more AT&T services with the lure of a bundle discount--nothing more and nothing less. The bundle discount basically gives you your locals for free, which used to be included in the basic price when DISH did not. It's just smoke and mirrors. I guess if you don't believe me just call DISH and ask them. The truth will set you free.