For the sake of truthful discussion (which is why we’re all here):

A. In a world of 7 billion people, there are people who are immune to fatigue at 25 hours. Like a lithium battery vs nicad, at some point every human will run out of juice, but the performance diminishment isn’t linear for everyone and the time to exhaustion is also different.

B. He is probably more diminished than he realizes, but (if real) maybe at 25 hrs he is like most of us at 16 hrs. We don’t know.

C. His type of schedule wouldn’t not be healthy for 99% of us.

D. I personally am happy only flying a couple red-eyes a month. I fall somewhere right under the fat part of the bell curve as far as fatigue performance degradation goes