Hmmm.... when and where did you read this article?
As far as I know, all the search engines give importance to fresh and new content. Though, Bing does not have an Algorithm as good as Google (don't think it will even have it in future

) still I think it gives importance to fresh and new content.
Please make sure that you read articles from trusted sources as some of the sites publish irrelevant content on the site just to get good rankings in search engines