Stroke length and stroke angle —or translation and rotation, if you choose to be more technical— are two of the key elements of the casting stroke. Good technique asks for those two elements to be used in the proper sequence —that is, starting with translation only and applying rotation at the end of the stroke—, what has been called delayed rotation, although my mate Bernd Ziesche prefers to say:

“It is not delayed rotation, it is rotation at the right time.”