There is no swing in the DRS.
The term swing applies to rotation on a curved path about a fixed point. In a normal waltz turn, we have swing in the vertical plane, which combined with CBM rotation produces sidesway.
It might be tempting to argue that CBM is swing in the horizontal plane, however this is not the case. When done properly, a movement with CBM is not a curve around a fixed point, but rather a rotation superimposed on a straight-line movement, without maintaining a constant radius from any fixed point. The reason is simple - to produce a curved path, you must have a force pulling you towards the fixed point. In the vertical plane, this is your feet pushing you up from the floor, but in the horizontal plane there is nothing comparable to work off - except your partner, and you don't want to do that!