Thought this stat from the "Search improves the bottom line" was a little lame:
89% of the traffic generated by search ads is not replaced by organic clicks when ads are paused.*
Google Search Ads Pause Studies, July 2011 *For those who have been running paid search campaigns.
My parsing of this interprets it as: "89% of advertisers aren't dumb enough to compete with their own organic SEO traffic by placing paid ads sponsoring the same keywords."