I knew it was unusual for a 12 month old to identify letters but at the time I was concerned about his gross motor skills which were about 50% delayed at the time. When he was tested at 12 months, they told me he was 50% advanced in expressive/receptive language skills. While the testers watched, I opened up an alphabet book to the letter A and he said A. His favorite letters at the time were A, B, P & Z. He never did learn things in the order they are supposed to be learned. They told me it was very unusual for a child with motor delays like my son's to be so advanced in other areas, in fact they had never seen another baby like him.