My boy is 9 weeks and one day. He smiles, but is VERY reluctant to give them out you have to work for them! Mostly in the morning then you can barely get him to do one in the evening. He also will make load noises, but only when he is fussing, he won't "coo" as you and other describe. Occasionally when he is smiling a lot he'll do this cute intake of air sound which I think is a pre-curser to giggling, but yeah no talking or cooing really. It started to stir on my mind today...