They do in some counties. I'm a pollworker in Alameda County and every precinct uses an optical scanner (made by Sequoia). At the end of the night the memory pa

They do in some counties. I'm a pollworker in Alameda County and every precinct uses an optical scanner (made by Sequoia). At the end of the night the memory pack is removed and taken back to a return center to be counted. The paper ballots are boxed and sealed in case there are any problems with the electronic tally. Speed-wise, it only takes the machine about 1 second per ballot card.