From the Wikipedia Page:
They also claim that NCT makes the mistake of claiming a different form of salvation between the Old Covenant and the New Covenant even though the 'salvation act' had not yet been carried out in the Old Testament. One such example would be from the book "New Covenant Theology" by Tom Wells and Fred Zaspel. Page 31 deals with the gospel preached to Abraham and says that it was not “the gospel” but the “promise of the gospel”. Referring to Romans 1:2, the book states, “Paul looks on the gospel as 'promised beforehand through his prophets in the Holy Scriptures' plainly implying that it had not yet come in OT times.”
These guys like Zaspel don't know what they are talking about. The promise of the gospel and the gospel are the power of God, and that same word of God that put faith regarding the future redeemer, saved Abraham. These so-called New Covenant Theologians are pretenders. They refuse to see that the power of God in the salvation of the elect Jews as being the same as for the elect in Christ. The gospel is that Christ died for the sins of those who hear, the elect.
Abraham believed God, and that faith is the same, and the power of believing in a Messiah to come created the gift of faith in the same way as the gospel sovereignly creates faith. Yes, the reality of Christ's death and resurrection transported theses believers into the Kingdom of God, the New Covenant Kingdom. But to say they did not have the power of God and the same faith that we do is false religion. Faith is always counted as righteousness. Every act of faith is counted as righteousness.
The gospel was clearly preached in the Old Testament and they received the same good news as we do. Hebrews 4:2 is just one proof.
The elect heard it, prophets and the others, but the majority of the Jews did not and were not called as the spiritual elect.
So for people to reject NCT because it is dominated by pretenders who I separated from a long time ago is just blind. I have no control over what is said in the Wikipedia entry because I was rejected in my contribution before. I wanted to say that the gospel convicts of unbelieve and that law guilt had no power but was rejected. I don't trust a single author on that Wikipedia entry. Same with the folks who share the same subject on Theopedia!
These people will all perish because they all think they came to Christ by the power of law working on their hearts. And that is teaching that opposes the truth of the gospel.