bhallic - are you referring to the racquet arm having a delay behind the ball toss arm? If so there are many coaches who advocate this (I think Heath Waters was one who speaks quite passionately about this - if GA Tennis is around he might be able to clarify if this is still the case or if my memory has deserted me!).
Personally I think it's more a matter of preference an I tend to work with players to try the various arm config's to see what gives them the best rhythm and feel.
Do you expect me to run forward and get it in one bounce when I am hitting? - Sureshs 2014