It should be pretty small.
Basically the way to look at is that laptop screen typically operate at 60Hz which it gets refreshed 60 times per second and that translates to being capable of displaying a maximum of 60 FPS.
Each second is equal to 1000ms (milli-seconds). A screen that operates at 60Hz displays up to 60 FPS. That means each frame is displayed on the screen for 16.667ms. A screen with a 8ms response time means you will roughly get a half frame delay between doing an action with the keyboard/mouse or controller and when it is displayed on the screen. A screen with a 5ms response time means you will get slightly over 1/3rd frame delay. The higher the response time, the more likely you will see ghosting on the screen in fast...