Just to be clear- I've never been to any CS events, never met anyone associated with them or NMRA in person, don't sponsor any CS racers or their class, don't even pay any contingencies. In spite of that, every single Coyote Stock event for the past several years has been won using one of my ClutchTamers. Likewise in NMRA Factory Stock.
I've had NHRA stick shift class racer customers win at the US Nationals as well... on radials! Several top shelf FWD and AWD import teams are customers. Hell, Subaru has even used them on their standing start Rally cars!