Hi there, just a bit of info on the Mosquito : Check out the South African Mosquito web-site, it also has links to the Australian web-sites :
http://mysite.mweb.co.za/residents/tuffex/index.htmShort answers to your questions :
The Mosquito class in Australia have not yet officially adopted the spinnaker yet (Tim please correct me if I`m wrong here.) They have State Title championships and National Championships, at present sailed without spinnaker, as the Taipan class do in Australia. check out their web-site through the links page in the web-site listed above for more info. They have a growing number of spinnaker boats, and may soon hold regattas specifically for these, or may race under F16 class as dispensated boats, probably against the Taipan F16 & soon-to-be Blade F16 designs. I would expect them to be slower than the Taipan & Blade F16`s as they have much less sail area, but if it blows, who knows ... Sometimes less sail area is not a bad thing.
In South Africa the class have adopted the spinnaker as part of the class rules, this means we get to use the spinnaker at our Provincial (State) Championships as well as at our Nationals.
To the best of my knowledge these are the only two countries in which the Mosquito is sailed in any numbers, so there is no "world champs" for the class.
If you`ve seen one in action you`re probably in one of the 2 countries, my guess is Australia based on your questions.
Check out the Victoria class association web-site & contact Tim Sheppard for more info.
Cheers
Steve