Title. I used to run a proxy, and got smart priced there. 3-5 cents a click. On my new political site, I get ~15 cents a click. The keywords and the ads look expensive, and I believe they warrant more. I'm getting 0.84 CTR with 15 cents a click now. Is it because of the smart pricing? Does it go away? =/
Try filtering some fo the sites. Look at the urls of the sites advertising and see if they have adsense ads on them. If they do filter them.
New site with new adsense placement tend to have high CPC but it will goes down with time. I see that pattern after opened 3-4 sites.
As people say, the whole account gets smart priced. So most sites with good paying and converting keywords will make your account un-smartpriced.