if you ask me, i will say go for wordpress. many peoples use wordpress for their website because it is more easier to use and update. -cypher.
I find wordpress is good because of the adsense modules. Drupal is also nice for integrating ads and is not too much more difficult to setup.
use joomla, it has an adsense module addon for it & it allows your posts to be either blog-style or regular page-style. At the end of the day, no CMS is "better" for adsense earnings, its all about placement and blending
Wordpress is more search engine friendly...and it's really fast also with many user online at the same moment..
Another vote for wordpress. Drupal is an excellent option too. In the end its the content which will matter not the management system behind it.
I vote for stop making sites around Adsense, and make them around what you like, or think looks nice.