The Argentine Journalism Forum (FOPEA [1][es] for its initials in Spanish) presented the results of a survey of more than 70 online news editors in Argentina. Some of the survey's conclusions [2][es] refer to the use of social networks:
94% of online media editors think that social networks favor journalistic work, mainly because they increase the amount of sources of information.
The complete report can be found here [3][es].