I had been a Fram user for years before reading that. Now I'm switching to Pure 1. The guy that did that study was actually threatend with a law suite from a major oil filter manufacturer so that should tell you something.
Hmmm, I'm gonna stop using Fram filters and pay a little more now..
The study even says you might have a noisy drivetrain at startup when using that Fram Xtra Guard, and sure enough, sometimes it clatters for a sec on my car..