I like Cav, he calls things as he sees them. He's a bit arrogant, but he's got the results to back that up and I don't believe you can be truly successful as a sprinter without that sort of attitude. It'd be like asking a boxer to be all lovey-dovey over his opponents, they could do it, but don't expect them to win a fight.
His team must love him right now: the first thing he does after a stage win is wait for each of them to cross the line to say thanks, then he credits them in every interview, and I bet they all get a share of the cash for the stage win. He was spot on in yesterday's interview, he might have a few things to improve on but his team is working perfectly to deliver him to the right point to win the stage in every sprint. As a sprinter, or a team supporting a sprinter, I doubt life can get much better.
WRT the green jersey, Cav's been pretty open about his primary goal for this year's tour being to win stages and get to Paris to win the final stage. If the green jersey comes with that then it's a bonus. If he manages to do what he wants this year, I reckon you'd see him going for intermediate sprints as well in next year's tour, but he wants to finish one first. Don't be fooled into thinking the green jersey doesn't mean anything to him, I suspect that the further through this tour he gets and the more likely it is he'll finish, the more he'll want the jersey as well as the stage wins.