I too think he is genuine to his teammates, many many times (like every time he's won a race) the first thing I see him do is jump off the bike and, smiling, embrace his teammates.
If his reaction after the finish doesn't show he's thankful to his teammates when they deliver him to a win I also remember a couple times when he has decided not to pull through and instead chosen to let Renshaw take the win. In one of his Champs elysees wins where Renshaw was 2nd he said if he had known Renshaw was in 2nd back there he would have sat up to let him take the win.
It's true though, he doesn't handle mistakes (made by him or his teammates) well.