Good grief, how gullible and clueless can you be? How much would you wager that the percentage differences shown with 1% in will hold? That's what my comment was about, or maybe you have a reading comprehension problem.
I think the news organizations compared the actual results from the currently-reporting precincts with their exit polls for those precincts, and decided they matched up well enough to trust the exit polls for the rest of the state.