I have a theory: "He who controls the whiteboard controls the conversation." There's a certain level of implied command when you're standing in front of the room putting your ideas into writing, or real-time editing the thoughts of others (no matter how subtlety)
If you're an introvert, it may be extremely hard to combat this extrovert-controlled reality.
At Boundless, we do our best to make sure everyone is a capable "whiteboard warrior", allowing the best ideas to surface. The best way to ensure such equality, is by hiring folks who are comfortable communicators - one of the reasons we screen all candidates by asking them to give a full-team presentation. Can they hold the companies attention and make a point?