When I was an amateur hiker I frequently thought to myself that I should be the one who walks in front of the pack. After all, I can hike very quickly. I can easily take the lead and move the entire group quickly through the landscape. As I said, I was an amateur hiker and was both foolhardy and well over-estimating my skill.
As any experienced hiker will tell you, this is a terrible idea. Hiking is not about going fast, it is about moving slowly and enjoying yourself. Having the most quick person lead is a good way to turn a hike into a death march for the slower members of the group. Instead the slowest person in the group should be the one leading and setting the pace. This ensures nobody is left behind and the group moves as a single unit.