The other day, we reported again that Google Testing Dates on Search Snippets. But it is much more than just dates. Google is now showing additional attributes from the content on the page. For example:
Notice how the above result shows post numbers, author numbers, and the last post date. Clearly, in this case, Google thinks this blog post is a forum post or maybe not, maybe Google classifies the "comments" in the blog post as a threaded type of discussion.
Will this stick? I am not sure - my gut tells me no, Google won't keep these in most cases. Maybe specific queries will return these details, but I just don't feel that Google will keep these additional attributes on the search results pages. At least not in this fashion.