Empirical Support for The Deliverance of God?

I spoke briefly at a Melbourne Cafe Church yesterday evening on the subject of salvation. I decided to give them an overview of Campbell's critique of 'Justification Theory' as outlined in The Deliverance of God. The nodding heads and direction of the conversation suggested that for this group of 20 or so, the critique gave them a way of articulating long-held concerns, puzzles and frustrations that they have with the soteriology of their Christian upbringing. There wasn't much time to talk about the alternative, but I found it interesting how quickly the critique resonated with people. All of which makes me feel that Douglas or someone else should probably write a popular version of the argument sooner rather than later.