Forum Moderators: open
You can change that by adding:
&scoring=d
to the url.
Using their example for a "lemurs" search:
[news.google.com...]
produces a feed sorted by relevance
[news.google.com...]
produces a feed sorted by date
One more tip:
[news.google.com...]
makes the news feed search term capitalized. (Lemurs vs. lemurs)