From the tens of millions of consumer reviews posted on retail giants like Amazon.com to the more specialized message boards of Motorcycle.com and Macaddict.com, Piersall estimated that 80 percent of all human discourse now takes the form of product reviews on the web.

While some online reviewers give little more than basic pros-and-cons of a product or a one- to five-star rating, many use the write-ups as a vital means of self-expression, providing in-depth anecdotes about their own experiences with a particular product, or even their autobiography.
—Majority of Human Discourse Now Occuring in Online Product Reviews (The Onion)

Spot-on social satire. Four and a half stars.