tedster - 2:25 pm on Jun 1, 2012 (gmt 0)
The underlying mechanism (traffic quantity Vs quality) is complicated. The top performers are converting better while the duds are getting less traffic.
Thanks for sharing that much - no doubt it is complicated! I'm still stuck between thinking it's something Google does intentionally and thinking it's an accidental artifact of the machine learning that their statisticians use so much.