Why was Stanley surprised that X-Ray was the leader of the group in the movie holes?

Stanley was surprised that X-Ray was the leader of the group because X-Ray didn't possess the typical traits one might expect from a leader, such as physical strength or charisma. Instead, X-Ray's authority stemmed from his ability to manipulate situations to his advantage, particularly by using his status among the boys to gain privileges. Stanley initially underestimated X-Ray, thinking that leadership would go to someone more assertive or dominant. This dynamic highlights the complexities of power and influence in their environment.