Spearmaster, What keywords have you seen an inprovement for? Id guess they arent that competitive e.g. the serps you are on for those terms dont have a lot of ads on them ???
Example:
Neat tool on the site listed above …
http://www.scroogle.org/hitlist.html
For the search phrase “video poker” scroogle says 83 of the previous (pre-florida) top 100 sites have seen a decrease.