aristotle - 10:06 pm on May 23, 2010 (gmt 0)
This pattern seems to include "connecting words" more often - words than might previously have caused the full phrase to be ignored as "a good phrase". The observation points to a shift that is quite complex in the indexing/ranking logic. Maybe something that required more computing power to bring live?
If a big increase in computing power was required to bring this live, couldn't this be an indication that the Caffeine rollout is finished?