While I agree with the critic, I'd also point out that at no point did blogs magically become bona-fide news outlets. Sure, some are, but being a BLOG doesn't make it journalism, the writing does. I view Techcrunch as more of a Op-Ed column.
It would be a pretty easy argument to suggest that some blogs became bona-fide news outlets when people started to use them as their primary source of news.
I don't read newspapers anymore. I get 90% of my news from blogs.
TechCrunch has a presence that suggests they are a reputable source of information, and most of the articles there suggest the same. But every once in a while, Michael Arrington throws a strange, opinionated and arguably unprofessional article into the mix.
Absolutely no journalistic integrity.. even for blogging standards.