With a list of "who's using jQuery" that includes Google, Bank of America, Dell, CBS, NBC, Netflix.. your boss might not be the sharpest tool in the shed if "be a javascript rock star" bothers them..
I'm always suspicious of client rosters like that because in a big enough company, pretty much everything is being used in one way or another, even if it's only for someone's pet project. It doesn't mean a thing.