Adeo is principled in that he is honest and consistent. He's not an unadulterated cheerleader, and in Founder Institute, the aggressive/pressure inducing techniques (standing up before the room and having Adeo and investors/mentors question your idea) serve a very obvious purpose -- if your first high-pressure experience pitching your idea is in front of a VC, and you fuck up, you are doing it wrong, but it is a lot harder for standing up in front of a room of cheerleaders in training to be an effective simulation.

If someone is unwilling to endure high stress situations, that person should just get a job somewhere, vs. being an entrepreneur (and Founder Institute is pretty biased toward whole-business founders, vs. tech people). Calling people fat/ugly/bald/etc. is just a way to try to put them off guard. If you go out drinking with Adeo after Founder Institute, he's definitely a nice guy.