Is RIAA's Linares Affidavit Technically Valid?

NewYorkCountryLawyer writes "In support of its ex parte, 'John Doe,' discovery applications against college students, the RIAA has been using a declaration by its 'Anti-Piracy' Vice President Carlos Linares (PDF) to show the judge that it has a good copyright infringement case against the 'John Does.' A Boston University student has challenged the validity of Mr. Linares's declaration, and the RIAA is fighting back. Would appreciate the Slashdot community's take on the validity of Mr. Linares's 'science.'"