I have thought of myself as a slow thinker but have shifted to the view that it's more about myself putting a higher value on the thoughts that inherently take time to reach.

Other, "quicker" people are satisfied with superficial ideas and sometimes don't even care about factual correctness. But when I finally form my opinion, it is always very considered. When quick people are questioned it's often evident that depth is lacking.

So I am slow only because I do alot more processing, simply put.