From the NYT

Okrent writes in to repair the damage done by his overly snippy assistant:

Dear Atrios,

I recently learned that some readers wrote to this office concerning the protocols of White House press conferences. I cannot speak for other news organizations, but I can assure you categorically that the New York Times does not -- ever -- submit press conference questions in advance.

Yours sincerely,
Daniel Okrent
Public Editor

Daniel Okrent
Public Editor
N.B.: Any opinions expressed here, unless otherwise indicated, are solely my own

I've heard enough to believe that this is basically true across the board. But, perhaps the press should think about why reasonable people even entertain this notion.