If anyone wants to see the 24:07 warpless run, here's a rough recording I made of the NESticle movie playback back when I discovered it in July of last year:

In short, while you can TAS a sub-5 in PAL, doing so by a human is unrealistic.

Slightly elongated version: The PAL TAS is actually faster than the NTSC TAS, which would seem promising for getting a sub-5 on it, but this discrepancy is a result of the PAL FFPG, which saves multiple framerules on every level and, sadly, is not RTA viable (I wanna say it has never been done full-level on any level, but I'm not 100% on that). This is also important because the PAL version runs at a slower framerate than the NTSC version, meaning that an equivalent run would be slower on PAL than NTSC. As a result of these two factors, a sub-5 PAL would likely need at least one (and probably 3 at a rough mental estimate) of a trick bordering on human impossibility, so no, sadly, a sub-5 on PAL isn't feasible

A few months in the smb1 Discord, they did a poll similar to this, betting on the first 3 players to get 4:54, here's the results: https://docs.google.com/forms/d/e/1FAIpQLSc6W0qpsDzFUBMchMDvbWxClECl4X53WdocrAez99ErdMgvQQ/viewanalytics

Actually, while GTAce did tie all the TAS framerules, he didnt tie the TAS itself, the only time lost between GTAce's run and the TAS was GTAce's lack of a fast accel in 5-4, which could've saved up to 5 frames if executed perfectly

Not gonna lie I'm somewhat concerned that he's only looking for feedback here so he can create a more convincing TAS, he has like 3-4 obviously faked speedruns on his channel (my personal favorite is one on with the FCEUX TAS red arrow on the bottom right) so, it's obvious that this person can't be trusted, now I'm no authority on this subject but I expect all this person's future runs to be treated with HEAVY scrutiny