Perhaps he expected a scientific study of what happens in people's brains when they think they are talking to God, or some statistics relating the things people think God has told them with their own prior beliefs, or something of the kind.

Perhaps he expected an account of how someone met with someone else they admired/feared so much that it was like talking to God.

Perhaps he skimmed the title too quickly, and thought it said "Talking to Dog". Around the dino part, he realized that the dog shouldn't be talking, and rejected the article.