Yes, it was. The folks who did the original documentary also did a subsequent MTV series of the same name where the filmmakers arrange for couples who have met online to actually meet in person and find out if they are indeed who they say they are. (I haven't seen the show, but I have read episode summaries on Wikipedia out of curiosity.) My guess is that the series has popularized the term "catfish" to the point that whoever wrote the wank report assumed we all knew what it meant.

If I understand the term from the context of the original film, a "catfish" is someone who creates a persona online and then courts someone romantically with this persona. (A sockpuppet army may also be involved, such as in the case of Dan Fogelberg's Llamas.) Sooner or later it all falls apart when reality comes crashing in.