Shane wrote recently about the trends in Christian literature:
The results of this from what I can see have been: theologically shallow sermons, biblically illiterate churches, confused worldviews, and a trend to exegete the Bible based on culture rather than exegeting the culture with the Bible.
Evangelicals, by and large, don't tend to think theologically about different positions they hold or beliefs that they have. Recent surveys have shown that the majority of Evangelicals don't even think Christianly. The result being that many times in our beliefs and behavior we don't really look that much different than the world we should desire to influence.