Why the exit poll projections in Pennsylvania (52 Clinton-48 Obama) are delayed.

PHILADELPHIA, PA.–The networks are holding off putting out their projections in the Pennsylvania primary. I’m told the exits–often unreliable–show Clinton at 52 percent and Obama at 48 percent. Those close results are not being put out because the exit pollers are worried that pro-Obama respondents were more willing to be candid with exit pollers than Clinton backers.

Anyway, the sense in Obama land now is that Clinton will not have that blowout win she needs.