What blogs do effectively is provide a vehicle for instant comment and opinion. Some newspapers have established blogs for their journalists or other commentators. But the overwhelming majority of blogs — no one knows how many there are — are set up by amateurs using software that is easily available and almost free.Right. That's why you can read things like this and this in The Times.
These are not a new form of journalism, but new packaging for a venerable part of a newspaper. Even the best blogs are parasitic on what their practitioners contemptuously call the "mainstream media". Without a story to comment on or an editorial to rubbish, they would have nothing to say.
Most blogs have nothing to say even then. Without editorial control, they are unconstrained by sense, proportion or grammar. Almost by definition, they are the preserve of those with time on their hands. Blogs have a few successes in harrying miscreant politicians or newspapers, but they are a vehicle for perpetuating myths as much as correcting them.