After closing the polls, the paper votes are counted manually (in from of candidates representatives and public in general) by the poll station "vocales".
"Vocales" are citizens (4 in total) randomly selected for each poll, who must operate the poll during the entire day. They must report the results of the counting directly to the central system and sign a certificate, so everything is traceable down to the polling box, and it is very difficult for a candidate to conspire against a fair count. Results are normally available from 1 to 3 hours after closing the polls.
I'm completely against e-voting as I feel that transparency in every election is way more important than efficiency, and I think that it cannot get more transparent than this.