I resonate highly with this. Especially when brainstorming ideas with my manager. He's very quick with suggestions, and I am always saying ehhh I don't know let me think about it. I have realized that him giving me ideas quickly to iterate on is beneficial because I am always able to refine it. I still do think it is a deficiency in some sense as I would have loved to be one of those guys who could just grok stuff instantly and contribute quicker