It's easy to be the startup rabbit-punching the giant from below when the giant is so much taller it can't even see you when it looks down. At least that's the way I see it when Microsoft executives shepherding Bing, which is pretty much a startup, on the rare occasion criticize giant Google in public. If it's possible to be politic in criticism, Bing executives have certainly mastered the art. Two weeks ago, I spoke to Bing Director Stefan Weitz.