Anyone have a definitive answer on this new racquet's stiffness rating? Dunlop says 63, TW says 57. Since the racquet only just started shipping did TW test pre-production prototypes? Will their data be updated? Or has Dunlop failed to manufacture their racquets to their own spec? I understand that TW averages a sample of racquets for their data so this discrepancy, if based on production models, is significant.