User blog comment:Guts!/Anime Depiction of Luffy's Gear Second/@comment-4754162-20130528013429

From my understanding, the manga takes a "short cut" approach with those techniques we have already taken for granted. Gear 2nd (G2nd) should be one example, we all know Luffy always pump up the blood to activate it - its the basis of G2nd - pre TS. Post TS when we saw him again, Oda just "short cut" it away without using an additional panel to depict the pumping action.

Law's Room deployment is another example. During the scene where Law shambles the 4 Strawhats' heart, in the manga we could not detect the presence of the Room - which led me to assume Law has mastered his abilities without deploying Room being a necessary. Then during the anime, we can clearly see and hear Law saying "ROOM" and the deployment of room itself.

Basically what I am trying to say here is that the manga may have shortcuts but the anime is depicting the exact technique stance.