They probably don't understand it. I worked in business development for Fischer Tropsch catalysts and process technology for three years, as well as working before that for BP, and being a fuels and petrochemicals market analyst in between, so I probably know more about fuels than they do
It's just a very very pure straight chain hydrocarbon, there's not much to it chemically to do anything remarkable other than burn cleanly. Like the water in beer. All the benefit come from what else is in it.
Actually the process mostly produces and is tuned for diesel and jet fuel, but there's a small gasoline fraction, and you can always put heavier products through Fluid Catalytic Cracking which all refineries have, to switch to more gasoline.
Virgin Atlantic and United have flown transatlantic flights with part FT jet fuel, and they literally didn't notice any difference. You have to put the same additives in it to raise the octane level and protect the engine, which is what really increases the performance, and they won't be any different!