> ranking mechanism that can take account of the expertise level of the author
I assure you that all major search engines use the author name of articles and blog posts and even posts of forums like HN for all kinds of purposes that end up influencing ranking. It's primarily for anti-spam (a user account with good content on one page probably has good content on another page), but is used to rank quality/expertise too.
I assure you that all major search engines use the author name of articles and blog posts and even posts of forums like HN for all kinds of purposes that end up influencing ranking. It's primarily for anti-spam (a user account with good content on one page probably has good content on another page), but is used to rank quality/expertise too.