I dont think slow thinking affects the tasks in the example the same way. I have fairly good reflexes e.g. I am able to return pretty fast shots in ping pong, am able to catch things that slip my grip before they hit the ground etc.

But I am not particularly fast in mental maths.

Depending on how relaxed or engaged I am, I can have a witty reply or no comeback at all. Sometimes I have a reply but it is too sharp for the situation so I hold it back.

I think these engage different classes of thinking.