The end result is the same. Your character is moving faster than the world around them (and I did exclude full time-stopping from the effects super-speed can mimic). 

My question is this: What is the functional difference between slowing everything else by X amount and speeding up your own character by that same amount? As far as I can see, there is none. In both instances, the effect is the same. If anything, super-speed is MORE difficult to counter than time slowing (or time acceleration from the user's perspective, which would be an even more apt comparison). If the user is simply accelerating the effects of time on themselves, rather than slowing everything around them, it would literally have the exact same effects as slowing time around them and neatly circumvent the thing you see as hit-calling, which is actually just an inevitable effect of the power (unless the opponent has a way to counter it). No different than a character being killed by a bomb because they had no way to avoid the attack.

I guess I'm just not understanding whether it's the time manipulation itself that you have a problem with, or the fact that phrasing it a certain way makes it seem like calling a hit.