rlange - 7:09 pm on Jun 9, 2011 (gmt 0)
I'm seeing something similar, but not exactly the same. [flickr.com...]
So, yeah, probably just a test.
I'm not sure that CNN is doing anything special. There's certainly nothing special in the code on their front page and Google is grabbing the title from article's page, not the abbreviated titles on the main page. It's not grabbing the titles from their RSS feed, either, although it is listing the same top 3 stories in the feed, so... that might be something.
Other than that, it's probably because they're a big name.