 David O'Connor wrote that the Qustul incense burner provides evidence that the A-group Nubian culture in Qustul marked the "pivotal change" from predynastic to dynastic "Egyptian monumental art".However, "most scholars do not agree with this hypothesis", as more recent finds in Egypt indicate that this iconography originated in Egypt not Nubia, and that the Qustul rulers adopted/emulated the symbols of Egyptian pharaohs.More recent and broader studies have determined that the distinct pottery styles, differing burial practices, different grave goods and the distribution of sites all indicate that the Naqada people and the Nubian A-Group people were from different cultures.