Is "My Oedipus Complex" by Frank O'Connor narrated from the point of view of a young child or a mature man?

This is a somewhat complicated question.  It is narrated from the point of view of an adult man, but he is remembering his thoughts and feelings from when he was a young boy.  He expresses the turmoil that he went through at this time in his life with so much passion that it does sometimes feel as though he is experiencing it as he writes.  However, if you read carefully, there are clear indicators that he is writing as an older man.  In the very first line, when the narrator is describing his early interactions with his father, he uses the past tense, saying, "up to the age of five, I never saw much of him, and what I saw did not worry me."  From this alone, we know that he is at least past the age of five.  Another clue to the narrator's advanced age is his vocabulary.  Although he is describing childish thoughts and actions, he uses words such as "ominous", "amiable", "optimistic", and injustice."  These are definitely not words that one would expect a five year old to use.