I've met the guy before. He caught up to me one night on 71 South while I was in the Supra and started a race with me. Of course, there was no challenge in it. I talked to the kid later. He seemed like a nice enough kid, however, I know due to my incredible personality and friendly demeanor, I tend to bring that out in people. Not that he doesn't have a bit of the ricer mentality, but I find w/a little patience and guidance, you can teach them "The Ways".
Personally, I don't think the guy's a douche just for trying to start a little race. And if it was sprinkling, who cares? Let's remember he was in a Tiburon and does not have enough power to make that an issue.
I think you were afraid to be beat by it.