Just reviewing some of the numbers on patent cases and the percentages won vs lost vs go to trial:

What’s behind the rush to file patent lawsuits here? A combination of quick trials and plaintiff-friendly juries, many lawyers say. Patent cases are heard faster in Marshall than in many other courts. And while only a small number of cases make it to trial — roughly 5 percent — patent holders win 78 percent of the time, compared with an average of 59 percent nationwide, according to LegalMetric, a company that tracks patent litigation.

source:  New York Times, so it is probably slanted and distorted or maybe even just made up:  http://www.nytimes.com/2006/09/24/business/24ward.html?ex=1316750400&en=65001ada21beb03a&ei=5088&partner=rssnyt&emc=rss