Yep, I've hatched probably 4 chicks that came from eggs I had in the fridge for a week. They were last min. additions to fill up my bator. It's possible.
oh,.. i forgot to mention.,. a biggie with refrigerated eggs.. let them come to room temperature for a day before setting in the incubator... putting them from the fridge right into the incubator will cause condensation which is one of the main causes of rotten eggs!