Tevez is better than Llorente, and is clearly ready to make an immediate impact. He also has an obvious understanding with Vucinic. Ergo - those two start.
And after 3 games it really is not 'worrying' that he played 'no minutes'. Let's get real. We have scored 9 goals in 3 games. So I'm struggling to think of anything which is actually less of an issue right now than who is playing the fill-in minutes en route to three points.
Quite obviously Conte is not happy with him right now, or he would play. When Conte thinks he is ready he will play, and when he actually plays maybe it would be wise to then judge him.
I think all this stems from anxiety to see him play rather than anything else, and maybe a morbid fascination to see someone fail.
I think the truth is somewhere in the middle. Conte can be extremely stubborn and dare I say, obsessive when it comes to new players fitting the system. We've seen it with Elia, Isla and Bendtner lately. Tevez is and was always going to be a guarantee. Llorente unfortunately has come off a season that's a bit of a write off, which seems to be what Conte is judging him by for better or worse.
There is a fair argument in saying that at 4-1, you'd help the new player break in, without the weight of expectation, but that didn't happen. While Conte also justified this by saying that he's still not accustomed to the system being a Spanish player in Serie A where the defenders are a lot more experienced. I feel like that's directed to the player rather than the media.
All that said, irrespective of what Conte thinks, it is only right that the player is given a 6 month period to acclimatize to his new environment, if he is to be considered a long term entity on this team. Llorente will definitely get his chances. Some of us expect him to start at the outset, so we maybe a bit disappointed, but from a long term perspective, I think it's ok if he doesn't feature in the first month or so. A little more time than that, can begin to build anxiety in the player himself and create self doubt and affect temperament. You stop playing freely when you're under the microscope.