@Bhutan - I think that organizational behavior in a company has a lot to do with the organizational culture. I think that if the company is formal and all of the employees are dressed in business suits and work long hours, they will act differently than in a company that offers a more casual dress code with with flexible hours.
These employees will probably be more relaxed and less formal because the culture of the company is that way. I also think that the flipside is possible too. If you work in an environment where the group stays late and works twelve hour days, you will probably feel uncomfortable working only an eight hour shift even though you already completed your work for the day.
In these types of environments the group often waits until the boss leaves before they pack up for the day.