Yup, everyone is different. That's why low carb diets work great for some, but not so good for others. It's also why simply following what other people do doesn't always work for you. You need to learn about how your body works, and adjust accordingly.
I still think virtually everyone can (should?) train fasted, as long as the volume isn't too high. But to each their own
Since your friend is a 'bodybuilder' I assume he's on steroids. I wonder what his workouts would be like with 4 hours if he was not on steroids?