Our only point is, very simply, that the Covenant of Grace is the New Covenant. The Covenant of Grace is not the Abrahamic, Mosaic, or Davidic.
I agree with Brandon here-I hold that the NC IS the COG. I posted this link on a previous thread and it was closed down right afterwards before anyone could interact with it. I have posted this once in the past and it was not so well rec'd. For what it's worth, here is it again: