You can always find one truth in a hundred lies. In other words, despite the fact that something can be posted over and over again with different versions, there will always be one true fact. Unless of course you count gossip.
If you think about it, if there were 100 people at an event and each posted a piece of information different from each other; you would have a detailed story. Of course thats if people stayed close to the truth. With this said, I think the quality has improved, because we as a people are getting two sides of the story, and have many different ways to access it. We get the popular view and perhaps a personal view. With news sites having their own blogs and accounts on various social media, the public can quickly access this. Information is not in short supply these days.