OotP Harry?

I was discussing Harry with a coworker of mine, and she told me she thought Harry was really annoying in OotP. I couldn't believe it! I thought Harry was at his most real, and completely within his rights to behave the way he behaved almost every step of OotP. I mean, come on, Dumbledore's Army!? He came into his own, then. It was exactly the way I pictured Harry to be, using his experiences to help others. He was wonderfully "in character," meaning that JKR's development of Harry throughout the series is right on, no rushing or fudging. What do you all think?