Remember the scene where Salazar sends sharks to hurt Jack and then runs with his crew to finish the job? I did an analysis of this a long time ago and sent it to @daddy-salazar before I made this page, but it wasn't entirely accurate, so I'll do it again here.
According to the novelisation, the boat with three passengers was one mile from the Silent Mary, or 1609 m ~ 1.609 km
(No information is given whether this is a normal mile or a nautical mile, so let's assume it is normal), but we don't know how far from the shore the passengers were - we can estimate that it was another mile, although that would be an exaggeration, so let's say half a mile
So in total, the estimated distance from the Silent Mary to the shore is about 2415 meters - almost 2.5 kilometers.
I will start counting the running speed of Salazar and his crew from this moment:
But let's take into account that they had to slow down before reaching the shoreline, so we will round the final result to a whole number.
From the start to the stop in front of the shoreline, 1.46 minutes passed, or 106 seconds.
V=2415÷106~23 meters per second
23×3.6~83 kilometers per hour...
This result is simply unimaginable.
But mathematics and physics speak for themselves.
They took 5-6 steps per second
That means that one step was about 4 meters long.
Considering their physical power (according to the novelisation, they could throw people against walls and people died from injuries after a moment of being thrown)
The fastest man in the world ran at a speed of about 45 kilometers per hour.
This means that Salazar and his crew, strengthened by adrenaline, were able to run about 1.8 times faster.
So how fast were the sharks to outpace Salazar and his crew by so much?
According to calculations which were done in the same way,
More than twice as fast as Salazar and his crew
(You can see it, by the way)
Now you can imagine how physically POWERFUL the creatures released from the Triangle are.
Now the statement that you can't escape from them hits harder.
And they MUST have realized their physical fitness to say so.