I thought Santorum lost?
At this hour in 2000 and again in 2004, Bush had "lost" too.
Don't buy the exit polls. They are a pure crap shoot and if the media were concerned with accuracy, they wouldn't waste their money on them.
And can someone explain why it is so important to call a winner 2 minutes after voting ends? Could we wait 2 hours, or even 2 days for the votes to actually be counted? If exit pools are all that necessary, why even vote. Just sign in with the college kid with the clip board standing outside the precinct.