frankbomarito - 2:20 pm on Oct 31, 2011 (gmt 0)
My RPM rates are considerably higher for CPMs compared to CPCs but they only account for 23% of my fills.
I recieve about half of my adsense income from that 23% but would be afraid to ban any of them because it may affect the % of cpm ads I recieve.
If you are comparing these CPMs to other networks some adjustments are necessary since Adsense counts ad units that make up a creative rather than the full creative.
I use the following multipliers to compensate for the cpm differences.
728s x 1.7
300s x 1.4
160s x 2.7