I'm not going to say race him or not. But, it sure is tough to resist such a challenge (for me anyway), especially since our bikes can blow him away easily.
Last Spring I got into an impromptu drag race (stop light to stop light) with a guy in a 1200 Sporty and beat him 2 out of three lights. That was before I did any mods to my bike at all (except AI removal).
Soren