The methodology varies by project but generally managers are fairly accessible and internal communication is an informal process most of the time. Performance is based on goal setting and ensuring that goals are achieved by the end of the FY.
For my team, the management is quite relaxed, which is good but sometime doesn't help with direction.
Not good mentors. I have been put in a team that is not relevant to my skillset. Don't have positive things to say about management. They don't initiate, they don't provide work. As an intern it should not be your responsibility to source work within the company.