Annoyance: on an iPhone the mobile site has some sort of custom scrolling hysteresis which makes it behave differently from any other mobile site. The difference is enough to make the site unpleasant to use.
Thanks for the feedback. Our engineering team is actually really good about hearing people out seeing what can be done. The head of that team is @donohoe on Twitter. Also, they have a tumblr that explains the choices they've made: http://open.qz.com/ I'll also forward along your comments.