This Ft. Worth Star-Telegram article from about a month ago reports that, since enactment of the Texas Medical Malpractice and Tort Reform Act of 2003, medical malpractice lawsuits in Tarrant and Dallas Counties have been reduced by as much as 60%. A couple of weeks later, this Austin Business Journal article and this PIAA press release report that Texas doctors are enjoying one of the steepest declines in malpractice insurance premiums rates in recent history — almost 30% over the past four years.
Pretty hard to argue that the parallel reduction in lawsuits and insurance premiums are a coincidence.