Well, all you can do is ride your race... eh? Although, it's a little distressing when you think you are going to cream the competition and it turns out it won't be that way.
Hey, at least you didn't find out race day how fast they are! Right? But don't let your practice ride get in your head. You never know... they could have a bad day... get nervous in a race, etc. Just do your best!
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"