It can't be misleading in that way, since it isn't clearly isn't leading towards a conclusion of one grip being the best in all situations or thumb placement be

It can't be misleading in that way, since it isn't clearly isn't leading towards a conclusion of one grip being the best in all situations or thumb placement being the only factor that matters. It says that when controlling for thumb placement on a "mid-range" disc, "placing the thumb about 3 cm from the outer edge yielded the best results for all the participants in terms of simultaneously high average spin rates and launch speeds."