The Pew Foundation has surveyed evangelical Christians on a variety of topics, and here's an interesting result: only 3% accept evolution. And it's worse than that, since that 3% seems to be just in the bounds of noise and the frequency of individuals who essentially reject the basics of Christianity.
To put the 3% figure in perspective, it is the same as the percentage of evangelicals who answered that it is not "essential to follow the teachings of Christ in one's personal and family life": pretty much the defining feature of evangelical Christianity. Furthermore, the 3% figure for support of evolution by evangelicals was consistent across all geographic regions.
In further news, most of them regard secularism as their greatest threat, and also regard unbelievers as the most fertile field for evangelism. Isn't that sweet?