Refi Index Surges, Is HARP 2.0 Working?

The Refi index spike today to levels not seen since November 2010.  Many speculate that this is HARP 2.0 related.  Will this interation of the program be more successful than the first?  Some level of pain may be felt for premium MBS bondholders which include (among others) banks, money managers, insurance companies, and mortgage REITS