Interesting read; covers some things we've talked about.
The heart of the matter is that evangelicals lost their way when they abandoned the God-centered doctrinal foundation of Calvinistic theology and replaced it with a theological stew of man-centered belief systems.
One doesn't have to believe in the modern five-point Calvinist system to have a "God-centered doctrinal foundation." Candidly, having been to several Presbyterian churches that still hold to Calvinism, I can say from experience that they aren't faring any better than the SBC.
I believe that God is sovereign. But I also believe that He sovereignly gave us free will to choose to either accept His salvation and love Him, or to remain in our sins and love ourselves instead. If He did not, we have no moral responsibility and it is unjust to punish us--and interestingly enough, the whole tone of the above article up to the point where the author suddenly veers into a veneration of Calvin is that the churches are using their free will to choose modernism and selfism, not that God has preordained that they would do so and they're therefore just following His will.
The author had it right to begin with: The real problem with the Church in America today is lukewarmness, shallow teaching, lack of discipleship, and ultimately, putting Man at the center instead of God--which I could have sworn was Adam and Eve's sin in the first place.