I've personally found that the time taken to think through a discussion is akin to an inverse guassian curve:

- on the left tail are people who know little-to-nothing about (or have little experience with) the given topic and neeed a chunk of time

- then as knowledge and experience increases, less time is needed, eventually peaking out at what appears to be instance understanding + ability to communcate effectively about it

- but then something interesting happens when they get even more experience + knowledge: they now know about all the edge cases, things that go wrong, etc. and once again take more time to think through the topic

I've also found that most everyone is the same in this regard. Every once in a while (like any normal distribution) there's an outlier on one side of the spectrum or the other, but for the most part, everyone is the same.

Where people tend to differ is in their coping skills in such situations. Early in my career I had to learn to ask people to explain their thinking. Later it was me slowing down and realizing there's likely more to it than I think (and for those behind me).

Now it's me telling those at the peak of the curve to slow down, because while they may be right, and -maybe- they've thought it through, that's probably not the case.

TL;DR to anyone who thinks they are a slow thinker - you probably aren't (like imposter syndrome), and just need to learn to slow the room down. Doing so will help you, others behind you, and those in front of you.