Trained humans can maintain a speed of ~20kph for hours (as in plural). Peak speed for a few seconds (which is what would be required to escape these animals if reaction time is not the problem) is ~50 kph for humans (but only for 10 meters or so).
Apples to apples, humans are far superior to these speeds. The best animals for these measurements do crush these figures (by a factor of ~3), but I would expect that the best dinosaurs wouldn't.
> Very large animals are effectively warm blooded by default due to volume to surface ratios cooling is a much larger problem than staying warm.
True, but being "very large" does not really help with either top speed or explosive power. The fastest animals are small (though not tiny, a decent-not-huge dog in size but much lighter) brittle little things. They chase, rapidly inflict a mortal wound, and run away, waiting until it is abandoned to eat. Fast animals, from cheetahs to rabbits are much lighter than their appearance would suggest. The animals with greatest endurance are larger, but humans are, perhaps surprisingly, pretty good at endurance. Clearly we, at one point, hunted like dogs do : not by outsprinting an animal in an intense fast chase, but by wearing it down for hours, slowly closing in for the kill. Most animals should not be able to escape humans using that strategy. Human hunters would make an animal sprint for it's life 10 times, letting it "escape" 9 times.
