Forum Moderators: Robert Charlton & goodroi
coincidence? I think not!
In the Google Search News forum, I've seen posts by members who've thought that AdSense hurt their rankings.
At this point, your "coincidence? I think not!" is merely blind conjecture, but you can always try switching ad code back and forth over a longer period to see if there really is a pattern.
My advice is to let go of the idea of any connection between AdWords/Adsense and organic search -- get back to improving your business. Just because event B comes soon after event A is no proof that A causes B. This is the logical fallacy called "post hoc ergo propter hoc", one of the major pitfalls to accurate analysis of any situation in life, business or anywhere.