You know I'm the first advocate for the power and importance democratized publishing. That said, while I believe journalism can and often does take place on blogs, I'm willing to bet that at least a sizable chunk of that 52% are way overstating their case. Reminds me of that scene in Crazy People:
The majority of bloggers -- 52% -- "view themselves as journalists, up from just one third of respondents last year.
Darryl Hannah: Who wants to be an ad man!
[mental patients enthusiastically raise hands and shout affirmatively]
Dudley Moore: Who wants to be a fire engine?
[mental patients raise hands and shout affirmatively with even greater enthusiasm]