Either someone needs to watch more closely or they need to put that announcer on their pay-no-mind list. Of course there's a play clock, there's nothing different here regarding that.
Perhaps your potentially inattentive friend was watching the St. Xavier-St. John Bosco game on ESPN3 last week when John Bosco was up by more than 30 points in the 2nd half and the OH-specific running clock rule was in effect. It still has a play clock, but the game clock will generally keep running except on COP, injury, and a few other things.