After all these years, you still don’t understand how election calls are made? I suggest you read up on how news organizations call elections. It is fairly simple and straightforward. You won’t be so amazed next time.
In this case, there was minimal information, to the effect that only 6% of the ballots had been counted, but the race had been called. Obviously a lot more ballots have to be counted to call a race. My concern was of political dirty tricks, that one of the campaigns had called the election early to discourage voters for the other campaigns.