I am certain it was intentional, because early in the press conference he intentionally called on TV reporters first, and said so. He knew the TV people would be under pressure to finish by 9. After he had called on all of them, he went to the print press, who of course didn't care about any deadline. He ran that conference right up to the wire on purpose.
So, he spoke to a large audience supplied by two popular network shows, got his message on Social Security and energy out, spoke plainly enough that most average people could understand, and managed to avoid the partisan pundits attacking him.
Pretty smart, if you ask me.
Makes sense. Thanks. It's always better for the country when the old media doesn't give us their evil and slanted summations.