That tweets from reporters get the same priority a tweets from bloggers. (And as far as I know they still do.)
And that reports from outside reporters get the same priority as Twitter's employee reporters. (At this time, as far as I know, Twitter doesn't have any employee reporters.)
And that last one is not true. Twitter is not a level playing field as far as where the posts come from. I just discovered this today, and was really unhappy to see what they're doing.
Here's a screen shot of three recent tweets of mine.
The middle one is expanded, the other two are not. They point to articles on Foreign Policy, The Verge and Technology Review, all respected publications, run by big companies.
Now here's a tweet pointing to an article from CNET. Note that instead of "Expand" it offers "View Summary."
And when I click on the View Summary link, I get a synopsis of the article.
This is something that had previously applied to apps, not content. Flickr pictures were sucked into Twitter and displayed along with the tweet, but pictures posted on my site were just links.
These are decisions being made by a private corporation, without explaining how or why one publication gets preferential treatment over the others. They, of course, are entitled to do this. But no one should think that this is a level playing field, that all content is treated equally, because that is not true.
BTW, it's not clear which treatment is preferrable. Would you rather have the picture on your site, where your commenting system applies, and you can count the views, and maybe show the reader an ad? But it's also clear that they are not treating the content equally. It is not a level playing field, and the basis for tilting the field is not visible. I imagine some journalism purists might argue that this already disqualifies Twitter as a platform for journalism.
Update: It's possible that Twitter is using OpenGraph tags (which I had not heard of until today). I've started a thread, if you have any information on this, please post a comment there. Thanks.