See, this is yet another reason I think DMC is bad for versus debates as you have blatant gameplay/story segregation. In the one cutscene where Dante uses Quicksilver, he does completely freeze time so that he isn't crushed by falling debris - even just standing there and poking it quizzically before walking past it and resuming time. But of course that'd be too OP gameplay-wise so they just make time lag instead of freezing it. But then what are we supposed to go by for a versus debate since the two contradict each other?
Of course there are plenty of other annoying contradictions like Yamato being able "to cut through anything" only for several people both in story and gameplay block it. But I digress... *sigh*