In today's Google hangout video (https://www.youtube.com/watch?v=P_XYLwDTBKo) John Mueller mentioned something that could be considered a little SEO golden nugget.
At around 14:40 in the video John discusses the need for freshness if a topic becomes popular in the news. He describes how a page might be replaced in favor of a fresher article while the topic is popular but revert to an older more evergreen article when the popularity spike passes.
In trying to visualize what that would look like I see trusted news sites being able to outrank any other site for a trending topic but not to hold onto that ranking long-term. News site SEO is thus likely very different than traditional SEO, confirmed, and it implies some interesting possibilities.