I had a look at my monthly figures from January to June of this year and I found an interesting trend. While clicks still make up the majority of my Adsense earnings, CPM bids are making up a consistently larger share of the pie. I don't mind since, according to the metrics, CPM actually provides me with a higher RPM compared to clicks.
(Sadly both RPMs are dropping)
Is anyone else seeing this CPM trend? Could it be that Google is taking Adsense in this direction?