Since Adrian had patiently listened to Jobs's lengthy talks at various banquets, how could he appear casual and indifferent in the office? Such behavior was merely a tactic to unsettle Jobs's emotions and profit from the situation. Jobs was smart and formidable. Just by looking at how he had returned to Apple, set a trap, and ousted Amelio, one could understand this; let alone the various deeds from the time he founded Apple.
This man was keenly intuitive, arrogant, and narcissistic, but also somewhat emotional, so this approach would enable better control of the situation. You think you're so arrogant and self-loving? I'm investing not in Apple but in you. You like to have total control? Not only will I not vie with you for power, but I'll unconditionally support you!
In fact, this strategy proved very effective. Although Jobs harbored some doubts about Adrian's flattery and enthusiasm, he quickly agreed. Consequently, Adrian's plan progressed further.