I'd argue that when it mattered most, Barry WAS as good as advertised. His play in Games 6 & 7, for the most part, was terrific. He seemed (finally) to settle in and accept that his teammates trusted him, which permitted him to play much more freely and loosely in those games. He attacked throughout Game 6 and his defensive length was bothersome to Billups during several points of Game 7. More than all of that, Barry provided an alternate ball handler who could be trusted to initiate the offense without turning the ball over excessively (despite his poor play during stretches of Games 3 & 4).
Just my thought.