The question is: Does the gender or culture affect memory? Several studies have been done and scientists came to the conclusion "Specific results indicated that women excelled in verbal episodic memory tasks, such as remembering words, objects, pictures or everyday events, and men outperformed women in remembering symbolic, non-linguistic information, known as visuospatial processing." This indicates that there is no superiority, memory wise, between males and females.
On the other hand, culture does afffect memory. Dr.Leichtman and the other researchers say that Caucasians dont have "better" memory than asians. Instead, people have the types of memories that they need to get along well in the world they inhabit. In the United States, she says, it's adaptive to have detailed narratives of childhood to relate.
In conclusion, we could say that a great memory is not something you are born with, it is something you have to expand throughout experience. Women excel in verbal episodic memory tasks mainly because most women are usually housewives, and throughout experience their memory has adapted to that environment.