[QUOTE=Quartz]
I think you may be: as I understand it, in America, because you use machines, the results of an election are pretty much known 15 minutes after the polls close.
[/QUOTE]
Actual vote counts, for local, state, or national elections, are never known 15 minutes after the polls close. It always takes hours, and sometimes days, to add up the ballots.
What may be confusing you is that networks report the results of their exit polls immediately after the polls close. If the polls obviously favor one candidate, they’ll declare that candidate the winner. If not, they say the race is too close to call until some real vote totals from key precincts verify the poll numbers.
Actual numbers are far more difficult to tally in the U.S. because the country is divided up into hundreds of thousands of precincts. Different sets of precincts make up the bewildering variety of offices we have. In one election you can be voting for city mayor, city council, city school board, city judge, city sheriff, county legislature, county executive, county judge, district judge, state senator, state representative, state governor, state comptroller, state attorney general, federal House representative, federal Senator, and president, along with several special district candidates for specialized offices like land use or forestry representative. Each of these votes have to go to a different overall tally comprised of other precincts voting for as many, but a different set of, offices.
Except for a few tiny villages, counting votes is an elaborate and time-consuming process that is subject that any number of mistakes - adding errors, copying errors, transcription errors, duplication, omission, you name it. So almost all votes are counted, re-counted, doublechecked, and re-re-counted.
Fifteen minute totals are unheard of.