Yup. It can't be because of ability that Boriello and Quag are selected ahead of him. Must be something else behind the scenes, surely. Same deal with Elia, although of course there have been rumours about his non-selection, such as lacking tactical awareness, fitness and such.
The only player that Conte has commented on regarding non-selection was probably Krasic and the deal with him not being good enough at taking the ball in traffic.
Until we get a WC CF we should have Matri starting every game.