I am quite sure AMD knows what IPC-gains awaits them with Piledriver, especially since they have shown Trinity up and running.
So assuming projections = "we have no clue", which I personally do believe they do, the only thing they don't know for sure is probably what clock-speeds it will get as that is the final thing they do with a new architecture. Since its a refresh of Bulldozer I am quite confident it should clock the same or even better.
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