I have always felt a pitcher has to feel real comfortable with any pitch that he is going to throw in a given situation. As a former College catcher back in the day when we catchers called the game, I told all pitchers on the staff, " the one thing I never want to hear is 'I didn't want to throw that but you called it'". That's why God gave pitchers necks to shake off catchers. Now, there are certain instances were that might not hold true all the time, and only in a very narrow sense where a pitcher might be young with a veteran catcher. But even then there needs to be a conference if they cant agree. As for pulling a pitcher at 15 over this? That's just ridiculous in my book. This is an age were you are learning the game.