I'm not sure I agree with the concept of responsive design in general. It sure sounds convenient from a maintenance perspective, but pretty terrible for a usability perspective.

A phone and a desktop are two completely separate user experiences. Cramming them both into one site either reduces the utility in either one in particular or complicates code with confusing branching conditions depending on what kind of device is being used.

It always felt to me the lazy way out.. I'm sure it applies to certain sites well, maybe simple content sites. But anything more robust and I think it breaks down.