Disagree.
We aren't talking about just rotating an aircraft about its axis without changing the direction of travel. A turn will always reduce the velocity on the original heading and increase velocity on the reciprocal (relatively).
My spacecraft analogy was on the same lines ie don't want to go to the moon now, want to turn and come home. First an RCS burn to rotate, then a main engine burn (don't know the acronymn) to decel/accel.