martinibuster - 4:08 am on Jun 20, 2010 (gmt 0)
FWIW, I run AdWords campaigns for phrases that I already rank in the top three for. All of my positions for major phrases that I track have improved. My backlinks are organic, nothing paid for, nothing reciprocated, nothing at all has been given in exchange for links. Last time I asked a site owner for a link was a year ago. MayDay has been good to me across a range of sites.