If not that, the Dems running the Iowa show must be unbelievably incompetent.
I helped out in several Canadian elections, and we did all the counting manually. It took about about 2-3 hours for each voting station after the closing, and the main election office was adding the station votes continuously as they came in and releasing immediately the intermediate results to the news channels. Even if the Iowa country bumpkins were not the brightest bulbs in those voting rooms, they could have done the complete recount easily by midnight and released the numbers shortly after.