What the Bible says about Peter as Spokesman for Disciples
(From Forerunner Commentary)

Matthew 16:16-18 It is Peter who most frequently responds and answers for the group. A reader of the Gospels almost begins to picture, when Jesus asks a question, that the other disciples glance over to Peter to see whether he will respond. It is almost as if they defer to him. Though this is not specifically written in Scripture, it seems to be their thinking regarding him. John W. Ritenbaugh Unity (Part 2): God's Pattern of Leadership Related Topics: Peter as First | Peter Designated as First | Peter Designated as Leader