Most simple transmitters have a framerate of 50Hz. So every 20msec servo information is transmitted. The frame is a steady timed transmission So when you make a steer move the latency is depending on which moment in the frame you make the move, so you will have a variable latency between 0 and 20msec. With fast cars and tight corners it can make a difference of getting the apex right, going over the curbs or going too wide.

Any decent transmitter with normal digital servo's you can have a frame up to 333Hz, that is 3msec narrowing the variable latence down a lot.

Then Sanwa and Futaba (Also the flysky noble) knows super response where the framerate goes up to 1000Hz and beyond making a variable latency of 1msec and lower. Only then special servo's are needed.