How Reliable Are Online Reviews for Anything?

First, I'm not talking about book reviews written by serious online book reviewers. So don't get all worked up into a huge snit until you read the entire post. Joyfullyreviewed, dearauthor, and others like them are not the people I'm posting about today. Like them or not; agree with them or not; they work hard at what they do and they provide a viable place for readers to find out what books are like before they make purchases.

What I'm talking about are book reviews on amazon and other web si...