That IS high turnout!

Just to add to that:

Though CNN, and Wolf Blitzer in particular, is embarassing itself by not seeming to understand that 850,000 votes can't come from 1% of the precincts in Texas, a little back of the envelope should clear up that they can't:

850,000 times 100 = 85 million votes

For reference, Texas has roughly 30 million people, not all of whom can vote. Also, I believe - though this is purley surmise - that some of them prefer to vote republican.