(the vast majority of) US Elections are determined by vote counting, unless you have knowledge to the contrary?

The most important one - the Presidential election - isn't. One candidate conceeds the election when the freaking media decides he has lost. IIRC Kerry pledged he wouldn't do that during the last campaign, that every vote would be counted, but in the end that's exactly what happened.

As for the other US elections, they tend not to hit the news over here in the same way, so no, I don't know for sure.

I'm well aware of the American fondness for democracy, though. I find it highly ironic when all the evidence is they don't have one.