This site, like most others built using a content management system rewrites the dynamic URLs into a static format, primarily to make them more readable. More portable, too, as we move our writings from CMS to CMS.
Google has come out with an odd post about static versus dynamic URLs, and it’s better for the Google bot to leave your URLs dynamic, because people screw up the rewrite rules. If you leave the URL dynamic, then the Google bot can figure out what it needs from the URL. However, if you rewrite it as a static URL, but leave dynamic pieces in, such as page number or the like, the Google bot may interpret the URL incorrectly.
At least, this is my interpretation of the post, and from the comments, other people’s interpretation.
The focus of Google’s suggestion is search engine optimization, and so probably only of interest to the SEO types. However, when Google writes posts like this, they ripple out like waves on a pond after a big stone is dropped in. Within a week or two I’m sure we’ll be hearing about how “best practice” for URLs now, is to use dynamic, not static URLs, regardless of the reason for the best practice.
No more permalinks to you WordPress folks. Or smart URLs for the Drupal users. Be brave, and show your parameters.