Opposition from the Daily Mail, The Sun and Daily Telegraph to the Liberal Democrats actually makes people more likely to vote for the party.
Asked the impact on their voting intention of those papers opposing Nick Clegg becoming Prime Minister, 15% said it made them more likely to vote Liberal Democrat and only 4% said it made them less likely, making for a net +11% saying they are more likely to vote Liberal Democrat.
What this perhaps underestimates is how the intensity of newspaper attacks have been highly mobilising for younger voters in particular. The strikingly desperate tone of right-wing newspapers who are partisan supporters of David Cameron could undermine the Conservative leaders' claim to represent "change".
But David Cameron is lucky in one respect which is that, while blogging and social networking has led to more scrutiny of the press agenda than in the past, the media remain rather reluctant to discuss the partisan role of the newspapers in this election campaign.
Yes, the theatrical absurdity of James Murdoch and Rebekah Brooks bursting into The Independent editor's office got several mentions.
But the claim by the political editor of Britain's biggest-selling newspaper, The Sun, that "It is my job to see that Cameron fucking well gets into Downing Street" has not been thought of as newsworthy by a single newspaper reporter or print commentator.
[UPDATE: With the honourable exception of The Independent, at least. See comments. Google News is not returning any results for the search, but is not exhaustive].