well, one thing that may contribute to it is that it's a cartoon version of survivor (sorta). And there really aren't any other cartoon shows like it. Another thing that may contribute to it, is that the show isn't a complete childrens show. They actually sware sometimes. Comparred to the other shows on cartoon network right now, it's a good difference. I mean, the only other new shows are chowder and flapjack, and those are just complete random, not much of a plot, children's shows.
This is my opinion.