I raced in the Scottsdale Grand Prix criterium yesterday in the junior (16-18 yr. old) category. It was my first race, so i was pretty psyched/scared. I raced on my commuter, a trek 7500 hybrid, with pretty skinny urban tires (can't afford a road bike). Let me tell you though, it was a windy day, and I would have killed for drop bars like the people around me. However, I think its pretty ridiculous that kids my age were racing with $3k+ cervelos.
Anyway i placed 3rd out of about 10 and have a nice trophy to show for it. I ride about 150 miles a week, which isn't too bad in my opinion. My goal for this crit was to not get lapped- i think i did pretty well!