Well for CPC in my opinion is adsense the best, but like said some users "Dont put all eggs in the same basket" Im use CPC, CPM, Popups and i complement all, that could give you a better perfomance and great revenue, and if adsense cancell dont worry too much, because you have the others
Yes, definetly Adsense is best PPc program compared to its competitors and it pays also at right time when you have earned your money.