Ars Technica reports that MPAA data regarding losses from student downloading for 2005 were way over estimated:

After commissioning a 2005 study from LEK Consulting that showed collegiate file-swappers were responsible for 44 percent of movie studio "losses" to piracy, the MPAA then used the report it bought to bludgeon Congress into considering legislation to address this massive problem. Now the MPAA admits that the report's conclusions weren't even close to being right; collegiate piracy accounts for only 15 percent of "losses." Oops. And that's assuming you believe the rest of the data.