Drew,
If you had a brand new kevlar Mozzie then the competition would really be making noises with or without spinnaker.
Mind you, if they also had brand new yachts at minimum weight they would also probably be under a fair amount of scrutiny as well.

And if your club had a F16 Blade or Viper racing then they would be able to see the difference.
Keep on kicking their butts and keep us all updated on your race results.
Regards,
Peter