I agree that the time has been reduced and the demand has expanded, but let's not forget computers and software double their power every 18 months, so it's not that far a stretch to ask for more shots in less time, the key is how far the director wants to go, in a show like SW you can't compare the ship you are modelling since there's no ships in real life, in Transformers and Iron Man (shows that set standard as truly flawless CG integration) you can compare your CGI to the real cars and prop-made suit....