Jeff John Roberts, writing in Gigaom, reports on data that shows that patent trolls, less frequently called "non-practicing entities," have gotten three times the damages in court than "real companies." The reasons for the higher damages awards for patent trolls? Lawyer Michael Strapp told Roberts that includes the "the economic model of patent trolling, which in many cases entails the troll building up a legal war chest by squeezing settlements from dozens of smaller companies, and then suing a big fish." Another reason is suing in favorable venues like East Texas and Delaware.
The Gigaom piece has some great charts, so I highly recommend checking it out.