They are progressive power metal buddy when a site reviews an album they dont lost every genre and by the way AMG lists kamelot as heavydeathblack metal so who cares what you found on some random webpage  The fact is they are progressive  As wiki states prog metal is Progressive metal is a genre of heavy metal music which shares traits with progressive rock including use of complex compositional structures odd time signatures and intricate instrumental playing The high level of musical proficiency is often combined with a lyrical counterpart in the form of epic textual concepts resulting in lengthy songs and concept albums As a result of these factors progressive metal is rarely heard on mainstream radio and video programs much due to that the length of the songs are not suited for those medias  Kamelot meets most of those requirements to deny that they are prog is to deny them what they are