User blog comment:IamJakuhoRaikoben/Chapter 383: Surfer Lucy, Review./@comment-24748439-20140510013721/@comment-4829046-20140511062609

You forget my context. Final Getsuga tenshou was achieved due to time variance. Several months in the precipace world was a few minutes in the Real world thanks to Aizen killing the cleaner and Isshin keeping things in control. However it is the opposite in FT's case like Knock said. If she spends even a few "minutes tops", several hours would pass in the real world, allowing Tartaros time to do more destruction and even regroup or prepare a new curse. Didn't you take that into consideration? I know FT mages have incredible recovery speed but even then, you would need to come out very quickly. 1 day = 90 days so 5 minutes = 0.3125 days which is.... 7.5 hours? I don't know. Someone who still does Maths please correct it.

And Loke came out using his own power several times. He just switched back to Lucy after he did so, allowing him his CS powers. He simply didn't do that in the S-class exam until the Capri fight.