A while back, I created an online experiment, based on a 2020 study, that identifies dogmatic thinking. https://shaungallagher.pressbin.com/blog/dogmatism.html Without giving too much away, this tracks with the 2023 study's results, in that people with higher intelligence scores are less likely to trust their System 1 gut reaction and more likely to involve their System 2 deliberate, logical processes.
In day to day life the major difference I notice in terms of speed and intelligence personally is that I'm often slow to respond to questions.
It didn't even occur to me to be self-conscious about this until eventually a friend pointed it out, but he kindly framed it as "you think before you speak" and this seems to have served me well.