They usually listened to the speeches rather intensely, rarely made any gestures during the speeches. In fact a few posters here or even tabloids (ex. Dinner for the Mexican President) were posting the pictures of Letizia intensely listening to the speeches to declare that she was too serious, sad or even depressed. In between the two speeches, they did often whisper into each other's ears (mostly Felipe initiated the talk) or looked at each other, perhaps that's the way they exchanged their opinions or let each other know their reactions. Those gestures are perfectly normal for a couple who are well connected intellectually. According to the journalists who followed them, they both had good obervations, after each event, they did critical analysis, usually nothing escaped them.