This is indeed not Any% strictly speaking. I suppose that you were referring to the
2014 "game end glitch" movie by Masterjun, which manipulated the game state sequence in order to trigger the credits in under a minute. It is worth noting that while you reach the credits, you don't get to reach the "Game Complete" screen.
Now this submission is about to obsolete
Scepheo's run in 8:45.87. The same glitches were used in both runs (telejumping, Space Station 1 skip, an Intermission skip using the Violet cutscene skip), the main difference being the newly discovered
Gravitron OOB in Masterjun's submission, which skips one of the main levels (The Laboratory in his run) and the Final level. Scepheos' run has had a legitimate place in the site and I believe that Masterjun's run has a legitimate place as well, since there are a lot of glitches - telejumping, the Violet cutscene skip, and now the Gravitron OOB - that you don't get to see either in the "game end glitch" run or the "20 trinkets, No Death Mode" run.
A proper naming of this category could be discussed. It is worth mentioning that in order to perform the game end glitch, you have press the Escape key to go back to the main menu and then reload your save. And it has been the only useful speedrunning trick that required the use of the Escape key. So "No Escape key", "No Save & Quit" or "No Credits Warp" are a few possibilities off the top of my head.
About the run itself, I have two remarks. First, as discussed in the VVVVVV speedrunning discord server, at the very beginning it could actually be faster to go to the Space Station 2 teleporter first instead of going to the Warp Zone teleporter first by a few frames. Second, and maybe more importantly, you can skip doing the Gravitron with a Save & Quit as soon as you enter the Gravitron room and then reload your save. So whether the Gravitron should be done or not is a legitimate concern. The main debating point would certainly be the entertainment value of doing the Gravitron in this run.
As a side note, this current submission corresponds to what has been called "Any%" in the RTA community of the game. Since we require to speedrun on the latest version in most categories (v2.2, where the game end glitch is no more possible) and since all runs are single-segmented (forbidding save & quits), it made sense for us to call it Any% and do the Gravitron in the run.
(Oh and if you are a former runner/viewer of the game, we have renamed several categories due to the discovery of the Gravitron OOB about a week ago. So what used to be called "Any%" for years is now "Credits Warp", which makes more sense tbh.)