Well, he has, actually, powered up a lot from there, but it doesn't matter. That was just a very low feat for that version of the guy, and here, we throw those in the trash and don't use them to judge characters. If we used them, regular-ish speed people could hit the Flash, or Batman could kick Wonder Woman or Hulk in the stomach to some valid effect, or Yellowjacket could dropkick Thor and stun him (all of these things have happened in comics). Sentry's first appearance is more than enough to beat the rest of the guys here, all at once. Adding his later stuff and it just gets worse.
So Sentry gets his high end feats, consistent with his presentation. His presentation is extremely high, and he's done things like will himself back from being atomized by the Molecule Man, more-or-less instantly, and then do the same thing in reverse to that guy. He's extremely fast compared to 99.99% of characters, but he's slow as molasses to the "fraction of lightspeed reaction" crew (and, obviously, their betters). It just doesn't matter if "all" those guys can do is dish out typical class 100 damage.