Funny(Tragic?) how the message can be misunderstood. I really would like to see a product backlog for the delivery of an enterprise messaging system without technical tasks. By the way, user stories are just one category of backlog items, as mentioned here and in Craig Larman's Agile and Iterative development. Yep, "he knows nothing about software development", or "It 's just an opinion of two writers." one may say. Yep, two respectable opinions and I'm ok with it, i must add.