"... From his second graph, it looks like the sweet spot is a bit under 100 words ..." Maybe this is why Amazon wanted their book reviews under 100 words. Wit

"... From his second graph, it looks like the sweet spot is a bit under 100 words ..." Maybe this is why Amazon wanted their book reviews under 100 words. With all the data they gather it's possible Amazon examined this metric. In "Amazonia" a book by *James Marcus" the first question Bezos asked Marcus was, "what's your GPA?" then "how quickly can you do a (mini-review) book review". Which happened to be on or under 100 words ~ http://www.washingtonpost.com/wp-dyn/articles/A22101-2004Jul1.html http://www.washingtonpost.com/wp-dyn/articles/A22101-2004Jul...