Nope. Cruz, Aldo, and Jones being champs so young are outliers. Keep in mind, the averages you see in the all of the links in the OP (champs per division) are when they first acquired their belt. It doesn't factor in how long they held their belt, or their ages throughout their reign. This greatly reduces the averages. For example, Silva counts as 31, but he held the belt until he was 38. Jones, Aldo, GSP, and a few others reduce the average age of the champions in their divisions in the same way.