The article does actually cover your serious point. > Indeed, it may be more useful in a "top rated" list to display those items with the highest number of pos

The article does actually cover your serious point. > Indeed, it may be more useful in a "top rated" list to display those items with the highest number of positive ratings per page view, download, or purchase, rather than positive ratings per rating. Many people who find something mediocre will not bother to rate it at all; the act of viewing or purchasing something and declining to rate it contains useful information about that item's quality.