There was an article a week or so ago about how people were complaining every time Techcrunch posted a story about some Twitter application. The author of the article wrote back in protest basically saying, "well if you don't like the articles, don't comment on them."
Techcrunch generates buzz. They're good at it. I may live in a hole, but I didn't really hear about Last.fm until Techcrunch posted that story. Last.fm got a pageview from me off of that story.
And personally, I don't really care about TC's opinion. I'm smart enough to make my own judgment. But until they report it, I have little way discovering new companies.