The short version is delaying the results screen correctly can trigger shorter dialogue.
If you want to verify that claim load up the current publication and delay the last circle press on the mandarin (1st bomb) by 2 frames.
--Or this gif:

It's an improvement of 33 frames that's all negated thanks to emulation differences.

And yes, you heard that right. 赤 (red) was called at the end and I cut 青 (blue).
I was finally able to demonstrate the randomness that is Hardest Difficulty on the last any% submission I'll ever do of this damn game.

feos: The 33 frame improvement mentioned above refers to the movie made on bizhawk 2.2.2, in which 3 frames come from faster gameplay and 30 frames come from the dialogue manipulation described in the submission text. But after it was resynced on the updated PSX core, gameplay was improved even further (10 frames now), while the non-gameplay parts became longer, negating the dialogue manipulation improvements. Gameplay itself now starts 121 frames later, and the intermission screens last longer.

This run ends up looking longer by real time, because the emulation differences are too cruel. Note that the previous movie's time would be 15:22.41 if the correct framerate was used, and the 2.2.2 version of the improvement is faster: 15:21.85.

It may be argued that we don't even care about non-gameplay improvements, and the 2.2.2 movie might be questionable, but it still has those 3 frames of faster gameplay, and manipulating the cutscenes is a relevant part of the movie as well if you ask me, since it can be manipulated in the first place. But yes, 10 frames faster gameplay is even better. Accepting over [4166] PSX Suzuki Bakuhatsu by Spikestuff in 15:22.40.

fsvgm777: *explodes*