If you thought media were bias on gay marriage, guess what

You were right!

US media 5x more likely to promote same-sex marriage viewpoints
Pew Research Center 17 June 2013
In a period marked by Supreme Court deliberations on the subject, the news media coverage provided a strong sense of momentum towards legalizing same-sex marriage, according to a new study by the Pew Research Center. Stories with more statements supporting same-sex marriage outweighed those with more statements opposing it by a margin of roughly 5-to-1.

In the coverage studied, the central argument among proponents of same-sex marriage was one of civil rights. Arguments against were more varied, but most often voiced the idea that same-sex marriage would hurt society and the institution of traditional marriage.

Almost half (47%) of the nearly 500 stories studied from March 18 (a week prior to the Supreme Court hearings), through May 12, primarily focused on support for the measure, while 9% largely focused on opposition and 44% had a roughly equal mix of both viewpoints or were neutral. In order for a story to be classified as supporting or opposing same sex marriage, statements expressing that position had to outnumber the opposite view by at least 2-to-1. Stories that did not meet that threshold were defined as neutral or mixed.
http://www.journalism.org/analysis_report/news_coverage_conveys_strong_momentum

And from NZ
marriage stuff bias