I read a warning in J.P. Moreland's book, "Love Your God With All Your Mind" this morning (pp. 93-94):
"Eventually the church without readers, or with readers with the tastes just listed [Christian self-help and books about Christian celebrities] will become a marginalized, easily led group of Christians impotent to stand against the powerful forces of secularism that threaten to bury Christian ideas under a veneer of soulless pluralism and misguided scientism. In such a context, the Church will be tempted to measure her success largely in terms of numbers- numbers achieved by cultural accommodation to empty selves."
This is both a prediction for the future, and in many cases, has already begun to happen.
The Constructive Curmudgeon also has a good post about Francis Schaeffer's take on the state of American readers.