I don't know about unintentionally. My guess would be that right now different approaches are taken and we are testing what will stick. I am personally annoyed by the chipper models, because those responses are basically telling me everything is awesome and a great pivot and all that. What I ( sometimes ) need is an asshole making check whether something makes sense.

To your point, you made me hesitate a little especially now that I noticed that responses are expected to be 'graded' ( 'do you like this answer better?' ).