I think David Carr is pretty balanced in his article. Niche media outlets have limited resources and they cover the news for specific demographic. Not paying attention to Fort Hood incident was a good example to show that priorities of niche media outlets should not change.
I think Texas Tribune is a good effort to save the news, when newspapers are dying out or merging across the nation. Newspaper need to move with the times and their audience. In next generation, we will only have major papers like New York Times still available in print.
I think Carr paid very little attention to business model of Texas Tribune in his article. I would like to have seen more detailed information about the business model of Texas Tribune. Paper are dying out, because they are not making the bucks. I would like to have known the view of Texas Tribune Editor of Google, which is killing news business. There is slight bias in the story, but it is still a well balanced story as I stated earlier. You cannot be a writer without any bias.