This review, from Publisher's Weekly, is a nice summary of the book (and the publicist at Baker was really happy it's not negative).
"A sociologist at the University of Connecticut, Wright examines recent survey data on Christian evangelicals to see if they substantiate the often misguided and hyperbolic public perceptions of this faith group. Separating the wheat from the chaff, he explains how some poorly worded, ill-sampled statistics give the wrong impression of evangelicals and why people should avoid giving them credence. Though he often blames the media for gleefully reporting bad news about devout Christians, he doesn’t spare evangelical polemicists such as Josh McDowell and Lee Strobel for their false exaggerations of evangelical shortcomings. His biggest target may be the pollster George Barna, whose surveys on Christianity have generated intense controversy. Wright’s colloquial writing style gives this volume the feel of a folksy college lecture series. The abundant use of graphics adds to the impression the book’s genesis was cribbed from introductory sociology of religion classes. The conclusions drawn here--no surprise--are that the most committed Christians practice what they preach, performing better than the rest of the population on a host of social measures including divorce, domestic violence, sexual misconduct, crime, substance abuse, and everyday honesty. The book would have been more interesting if it were about pirates, though (July)"
(Okay, I added the last sentence)