Here is the only speed related post from devs that we have:
"Speed does not function in "tiers", nor is there such a thing as a speed "tick"--it's actually a continuous rate of fill; all other things being equal, a unit with 144 Speed will always get the first turn before a unit with 143 Speed. A Speed value of X means that a unit gains X% of their Turn Meter per unit time. So, when comparing two very fast units (say, Unit A with 167 Speed and Unit B with 143 Speed), when Unit A reaches 100% Turn Meter, Unit B would be at 85.6% Turn Meter. How this is relevant to Poe is, while he is quite fast, he is still going to go after anyone with higher Speed than him on the first turn--there isn't a Speed "threshold". The only time a coin toss determines turn order is when two units hit 100% Turn Meter at precisely the same time, which mostly happens with two of the exact same unit at the exact same gear."
This was posted on Reddit by INRAJ, I believe. This directly contradicts anyone saying that ties are determined by speed. The dev himself says a coin toss determines turn order when two toons fill at the same time, which happens with two units at same speed, or when a skill is used to fill turn meter.
Gotta remember that this was posted long before mods. The only way for two toons to have same speed before was to be at same gear lvl. Now there are mods that change speed, allowing for more toons to possibly have the same exact speed.
You are using the old model for speed, which changed along with the Poe nerf patch. That model is no longer correct. Speed works exactly how I described it in my speed guide.
Everything the dev says above contradicts how you say speed works. Don't believe it? Do the math. Try to calculate turn order for two toons very close in speed using your model. You will find that that would clump into speed tiers, just like they used to before speed was changed. We know this doesn't happen anymore.
I already posted pics that prove it, and words from the developers of the game themselves. If you can prove otherwise, let's see it.
