Seems that there should be a purpose to the specific attributes of the architecture. Pixar has a pretty unique space as well. One design goal was minimizing the distance to any other person or place, while maintaining a central courtyard where chance encounters can lead to serendipitous discussions and keep the exchange of ideas flowing. There may be something to the ring shape for Apple's HQ. Minimize distance to places and people while maintaining the central courtyard.
What are the design goals of Facebook and Google? And LinkedIn for that matter.