Doesn't make a difference. There was still no "New Testament" to be preached from, and it would be preposterous to assume that everything they preached - every miracle recounted - every parable told - ended up in the canon.
Everything IN the canon is truth, but the story of salvation continues to unfold, otherwise, how could anyone even begin to defend Luther, who used no Scriptural citation in his infamous "95 Theses" - based on his interpretation of tradition and with no support from Scripture.
I am not interested in defending Luther, or Calvin, or Augustine, or Wesley, or the Pope. They were not inspired men. They were not apostles. In many points they all agree with the scritures. In many points they all (IMHO) erred grievously from the scriptures. My job, as a disciple of Jesus, is to teach and defend the doctrine as taught by Jesus and the men to whom the Spirit was promised.