An article (unfortunately behind a pay wall) in the most recent Scientific American examines people with superior autobiographical memory. The article points to evidence that this superior ability to recall life events has a biological basis. This is more evidence that there are real individual differences in memory.
Here is a video about superior autobiographical memory:
Related articles
I would recommend reading the skeptical view in Gary Marcus’s article “Total Recall: The Woman Who Can’t Forget”. I can’t see anything in this article to rebut that critique. In my view, there is nothing to suggest that Jill Price (the original subject) has a superior memory ability. Rather, she keeps a detailed diary (which is something anyone can do), and carefully learns and revises all the information about her past (which is again something anyone can do, although few people would be motivated to stick with).
I tried memorising my own life for a month, and can still remember what I was doing on each day in that month (February 2011). Like memorising anything, it takes some time and discipline, but I can see no evidence that it requires some kind of special talent, as the researchers here seem to think.