I just got off the phone with Adams County. Every provisional ballot that is determined to be valid, will be counted. It does not matter how close an election is. Adams County tells me that it is that way nationwide. Federal law actually dictates how provisional ballots are counted.
Karen Long, who is the Adams County Clerk and Recorder, tells me every election cycle there is a rumor that provisional ballots only get counted if the race is very close. She says that's only a rumor and is not true.