Christian Hypocrisy, or Just Human Weakness?

Via Avedon Carol's "Sideshow" who gets it from Relentless Optimistic,
Ronald J. Sider comments in Christianity Today:

The findings in numerous national polls conducted by highly respected pollsters like The Gallup Organization and The Barna Group are simply shocking. "Gallup and Barna," laments evangelical theologian Michael Horton, "hand us survey after survey demonstrating that evangelical Christians are as likely to embrace lifestyles every bit as hedonistic, materialistic, self-centered, and sexually immoral as the world in general."1 Divorce is more common among "born-again" Christians than in the general American population. Only 6 percent of evangelicals tithe. White evangelicals are the most likely people to object to neighbors of another race. Josh McDowell has pointed out that the sexual promiscuity of evangelical youth is only a little less outrageous than that of their nonevangelical peers.