I'm not really trying to debate with you for argument's sake, which for some reason you appear to be doing ~~ instead, I'm trying to be helpful.
Bombarding someone with a shit ton of words that essentially say "but you can't deduce that from that one article..." ~~
That is to say, whether you are worried about the ChronusMax requiring a USB Hub for its perfect passthrough for PS4 or not; I myself who used one to play USF4, others who play Rocksmith or use MIDI controllers, and finally the rest of the internet will say that a USB Hub is not adding any practical input latency whatsoever.
In that article, the hub(s) tested showed .5ms of added "measurable" latency (or up to 500us).
FWIW, who knows if the Brook adapter is or isn't better ChronusMax (with a hub).
The only worthwhile thing to take away here is that it's not fair to conclude Brook > ChronusMax because one requires a hub with regard to input latency ~~ and the many, MANY people who use such devices will tell you that the negligible latency added by these devices are far better than buying third-party monstrosities for the PS4 over the Elite Controller.
As for competitions, it's not that I'll know the reasoning for now, but back when USFIV was moving to PS4 there was a lot of talk on converters. Wireless got banned at some point (you can find EVO clips of the disconnects in action), and macro aside, there's no reason why a tournament couldn't provide their own converters (which is what I imagine they did with the CoD tournament).
There's nothing wrong talking about input latency in controllers in a Titanfall 2 thread.
EDIT: (forgot to address this) The point I was making was that SFV has more input lag than SF4 on PC and Xbox (and Arcade). Despite that, people just "get used it". If you're playing an online game regardless, input latency in converters is very negligible.
The notion that I was bombarding you with words seems a little ridiculous. But I'm not in entire disagreement with you, the latency is likely to be minimal and potentially indisernable, but the fact is that a USB hub adds latency (to whatever degree) isn't disputable. Having to add a USB hub inbetween the ChronusMax and the device is an added inconvenience, another point of potential error or failure. If you don't need to use one, why would you?
As for the site you linked, they report minimal latency across a network and functionality that is completely unrelated to the PS4. The article you are linking is intending as a guide on how to use the Beagle 5000 USB analyser, not an index of input lag of USB devices on a PS4, or even a gaming device. Your extending the resource far beyond its authors intention, and regardless of how 'happy with' the information you are, you're misusing and or misunderstanding it.
As far as being helpful, If you are stuck with a ChronusMax then you are better off updating it to remove the 10minute authentication, not adding a USB hub to your connection. It doesn't do this with the latest firmware (so they claim). If you wanted to be helpful to people using a CronusMax then that is the advice I would recommend, but generally I wouldn't recommend them to begin with. Otherwise, buying a Brook superconverter rather than ChronusMax would be a better option. The Brook does add a small amount of latency yet it's still very low and is going to feel more responsive than a wireless controller anyway, and he Cronus has been frequently reported to do the same (add a little latency), Additionally alongside the other issues the Max faces (banned from tournaments due to macros,
investigation for frying USB ports) it doesn't seem like a very helpful recommendation.
As for SFV people get used to varying levels of latency when they are all on the same playing field, but that doesn't make higher latency better. People get used to just about anything but that doesn't mean anything with regards to whether it's beneficial, or not. Unless there's a particular design intention, greater input latency is widely regarded as a negative attribute. That's why there is so many complaints about the latency in SFV, because it kills the reactive neutral game, the fact that there is more lag in SFV is not a good thing, and players frequently go out of their way to minimize that latency in any way they can.
I'm not debating with you for the sake of it, but because your posts have a tendency to feature a tone of unearned authority on matters that you seem to know little of, and it has potential to mislead and misinform people.