I think you miss how TechCrunch becomes a town square on the weekends with guest posts by contributors. As the comment you cite points out, surely Arrington would disagree with Vivek, at least as far as TC50 is concerned. Perhaps he would tie himself in knots to agree with Vivek aside from the awesomeness that is TC50, but the idea that TechCrunch is just Arrington's voice at this point is a bit off the mark.

And it's not just TechCrunch. Henry Blodget doesn't agree with everything Frommer writes at TBI, Dean and Matt at VentureBeat don't even write about the same stuff, and so on.