I am sincere. I think you could have handled this better by making the point you made and educating the person about your understanding of what a "rock star" developer is vs what you understood he needed in a less high handed manner.
The first problem is your answer is condescending. To my reading your starting with probably some insider BS about what he's asking. He wants to know where he can find a capable or "rock star" developer. You interpret "Rock Star" as someone with bona fides of a whole different magnitude and then take the opportunity to bitch slap the guy in public. He's not thrilled and takes the opportunity provided to slap you back. There's not a lot of mystery here. Don't not answer questions in order to preen around in public by taking a shot at someones possible misuse of a term that might mean something different to an insider than someone trying to get in or in other words don't be an a-hole.