You guys really need a lesson on reading comprehension.
There is a difference between acute levels of cortisol and CHRONICALLY ELEVATED levels.
Acute = energy, mobilization of fat tissue for energy, aid in tissue RE-construction (necessary for building muscle; yes, cortisol is necessary to build muscle, technically)
Having 100 mg of caffeine isn't going to lead to chronically elevated levels of cortisol. And no, raising cortisol the miniscule amount that 100 mg of caffeine does, every day, does not constitute as chronically elevated.
The factors that would lead to chronically high levels are not just brought on by a cup of coffee.