I think Zarhym handled himself pretty well -- his little snipe at players for thinking an expansion was "too soon" last year was uncalled for, especially since Blizzard told us they were actually aiming for one every year. But he's not distraught to the point of a Tseric yet, obviously. He's just not quite as smooth as, say, Drysc or Neth yet in quelling angry players.
It's too bad that, since the CMs are anonymous, we have no idea when they start of their qualifications or past experience (though of course we'd trust Blizzard to hire people who know what they're doing). But Zarhym got his official welcome to the forums -- when players start flaming you for saying the wrong thing, you know you've made it.