The "cold-blooded" mention was merely my giving an example of another way in which animals might survive temperatures that are beginning to fluctuate. Sure, long-term survival of extreme cold would require more than an independently regulated body temperature - not the point I was trying to make at all. In fact, nowhere near the point.
In your linked article, under the heading "Common Misconceptions":
"Much confusion has arisen over
what proponents of punctuated equilibrium actually argued, what mechanisms they advocated,
how fast the punctuations were, what taxonomic scale their theory applied to, how revolutionary their claims were intended to be, and how punctuated equilibrium related to other ideas like
quantum evolution,
saltationism, and
mass extinction."
"Fast" could simply be "relatively fast" for all anyone knows - on the order of tens of thousands of years vs. millions. Given a high birth and death rate, amidst mounting environmental pressures, might a species evolve "faster" than it might have otherwise? Very likely. What does this prove? God? I don't believe so.