Scott_F - 2:39 pm on Jan 14, 2011 (gmt 0)
Looks like I wasn't the only one to spot this new method of Adwords ad display. Here's a post by Mike Higgins of Search Engine People on the same topic:
He explains that Google is essentially segmenting broad/general toward the long tail. This results in fewer page-one slots for each segment, which could make the broad match ad market more competitive, raising CPC required to appear on page one.