The title may be a little confusing, but one can clearly see the trend in the last one hundred years as countless numbers of individuals have come to faith in something other than Christ and called themselves Christian.  James Adams presents some points on this matter in practice, theory and theology and remarks that many people are indeed being led astray by such things.  A few weeks ago, I preached a sermon on the idolatry of "salvation experiences" and I would implore all to consider the gospel and the implications of the gospel by such practices.  The following is the complete article by James Adams on the matter posted from here.
Introduction
What is Regeneration?
"Except a man be born again1, he cannot see the kingdom of God" (John 3:3). Our Lord Jesus Christ taught that the new birth is so important that no one can see heaven without it. Mistakes concerning this doctrine have been very destructive to the Church of Christ. Regeneration, or the new birth, is a work of God. It is not a work of man. It is not something that man does but something that God does. The new birth is a change wrought in us, not an act performed by us. This is stated so beautifully by the Apostle John when in the first chapter of his Gospel he speaks of the children of God as those "which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God" (v. 13).
What is "Decisional Regeneration"?
The history of the Christian Church has seen many errors concerning the new birth. These teachings depart from Scripture by attributing to man the ability to regenerate himself. When these false concepts of man and the new birth are adopted, churches soon become corrupted with false practices. The Roman Catholic church, the Anglican church, the Lutheran church and many other churches have all been corrupted at different times and to different degrees with the teaching of Baptismal Regeneration. Because of this erroneous teaching on regeneration, these churches have embraced false practices.
In the nineteenth century few controversies were so heated as the one over Baptismal Regeneration. It is interesting to note that C. H. Spurgeon (1836-1892), the most prolific preacher of that century, had printed in 1864 more copies of his sermon denouncing Baptismal Regeneration than of any other sermon. Baptismal Regeneration teaches that the new birth is conveyed by the waters of baptism. The sacrament is performed by man and is in his control.
But the twentieth century Church has, in "Decisional Regeneration," a more subtle falsehood to combat. "Decisional Regeneration" differs from Baptismal Regeneration only in the fact that it attaches the certainty of the new birth to a different act. This doctrine, just as Baptismal Regeneration, sees the new birth as the result of a mechanical process that can be performed by man. What is here called "Decisional Regeneration" has in its deceptive way permeated much of the Christian Church.
Our Purpose
The methods and theology of those that practice "Decisional Regeneration" need to be examined — not with a malicious spirit, but with a fervent desire that all of God's people may be one in doctrine and practice for the glory of God. We love all that are in Christ. But we agree wholeheartedly with Charles Spurgeon that:
The best way to promote union is to promote truth. It will not do for us to be all united together by yielding to one another's mistakes. We are to love each other in Christ; but we are not to be so united that we are not able to see each other's faults, and especially not able to see our own.