We see this here, where there has been a race series of 4-6 stops every year.
Directional and TT class.
To start with the TT class was just "everybody" mostly locals who was nearby at the event who participated just for fun - as it IS fun.
Then some found that with much bigger TT's, with special outlines - they could smoke every other TT on the water on the upwind legs.
So now it has been a goal in itself for these, to ride TT races and even travel to do this, eventhough they maybe "should" ride in the directional class on directionals instead - but they might be really slow here so they want to stay in top in the TT class.
The same old story as with every A/B/C class at events
And what about bigger fins, retractable fins, or daggerboards on TT's a la the Flysurfer - is it allowed and where is the limit ?
Those of us having a freeride raceboard cant compete in any of the classes, as we would be smoked in the directional class with big boards and huge fins, and we would win easily and not be allowed in the "TT" class.
So I am a bit more sceptical about the TT races now, eventhough I like the idea and great fun to start a race scene or simply have fun, in new areas - but it might evolve to something a bit more "hmm hmm" so to speak
PS: The boards that goes upwind the fastest, will usually win - even if not as fast downwind, as downwind is often a control issue and not a performance issue...