I agree with this, but it wasn't the consensus in the last GER match that I saw back on NF. Pretty sure people were literally saying that GER could blitz the Reverse Flash.
I mean, GER can't do that, but it has nothing to do with speed. RF moves around via time travel and dimensional shifting at a higher level than GER does. That's not even a speed contest at that point, it's a hax-off.
GER would actually beat anyone with "just" infinite speed, because GER's "speed" is [(time enemy attacks) - 1]. It just goes "le fuck you" and inserts its own actions before the enemies arbitrarily because acausality is a bitch like that.
Thrawn is like six levels of bullshit past that and I think at this point is a living time stream shaped like a human, so even GER can't do shit.
No. Much like the infinite numbers thing, this sounds sensible but isn't actually supported by anything in the material world.
All that going an infinite distance in a finite time means is that you can travel an infinite distance in a finite time. It is in no way related to your ability to cross finite distances. It has to be treated as a unique skill (conceptual hax?) because the variables involved aren't compatible with the velocity formula. You can't plug ∞ into the velocity formula. Not as time, not as distance.
It's fiction. It doesn't actually have to correspond to reality one to one.

If an author goes "He crossed an infinite distance in a day", then we shrug, give him infinite speed, and then that character wins or ties any contest based on pure speed.
People like the Flash (who outran instant teleportation and achieved a form of omnipresence at one point iirc) are an even higher level of bullshit that specifically does involve more than just physically moving from point A to point B infinitely fast, i.e. a form of time travel or dimensional movement.
I'm always down for arbitration, as long as we are all on the same page that that's what is happening.
Always insert "for the purposes of this hobby" in front of whatever stat a character is given on the OBD. It very rarely corresponds to authorial intent or in-story portrayal, its just the easiest way to quantify someone.