1. Sentry has moved fast enough to leave mirror images:
https://imgur.com/WNglVrq
He is all over the place and you see various afterimages performing various tasks. That alone is better than mere moving from point A to point B to juke someone.
But since these are comics we're talking about, his speed gets nerfed on the next page, when he faces the Hulk. There they wrestle and some comedy gets added in.
2. Here is a speed feat of Monster Garou fighting Platinum Sperm. At this point they're both faster than Flashy Flash, who is supposedly as fast as light, lol (according to Carver):
https://imgur.com/a/H2Hqyq3
I'm gonna be generous here and say that the left number on the timer is for the minutes instead of hours. Let's do treat it as a stopwatch, since that's the intention.
00:00'0"00
Minutes😖econds'Deciseconds"Centiseconds.
A decisecond is one tenth of a second. A Centisecond is one hundredth of a second.
Monster Garou performs a couple of actions within 50 Centiseconds, which would be half a second. That results in a bunch of afterimages and this aftermath, which also shows the afterimages:
https://i.imgur.com/nsmBInF.png
3. Amazing feat for Garou, but Sentry operates in milliseconds at the very least:
https://i.imgur.com/yniIv42.jpeg
That's one thousandth of a second. So Sentry would perceive Garous attacks in slow motion.
You can make the argument (rightfully so) that Cosmic Fear Garou and Upgraded Saitama are faster than that, but by how much? Monster Garou is faster than Flashy Flash, who was already slower than Blast... And we have Blast not being able to cancel planet busting power. Then that leads me to believe that the upper power levels in One-Punch Man are not on the high herald level. Because everything else is no limits fallacy. Keep in mind that Cosmic Fear Garous attacks were nuke level:
https://imgur.com/a/yCpjGm4
Again, it's an amazing power level, but... does it trump even high herald power? Hell no. And some people are seriously arguing that Cosmic Fear Garou would beat DS Sentry. Or any Sentry for that matter.
(Do you want to argue Saitama farting himself from Jupiter to Earth in few seconds? It takes light around 45 minutes to travel that distance. But such a travel time is still nothing the Sentry hasn't outperformed before.)
4. I also saw Carver stating that Saitama and Garou punched a hole in the universe. That of course is nonsense as well. He was referring to this instance:
https://i.imgur.com/CvSgS22.jpg
That big black dot is where the center of the explosion was. Everything around is the aftermath of the explosion. Carver must be confusing it with the universe and the black dot being a hole, where the stars could have been. Nah. Look at the manga issue and you'll see that the entire space in those scans was constantly pure black.
But you know who did punch a hole in the universe? The Sentry:
https://i.imgur.com/VVsverx.jpg
https://i.imgur.com/UpcgtxS.jpg
Wake me up, when anyone in One-Punch Man gets a feat on that level.