Having been introduced to shooting pistols 40 years ago in a NRA Bullseye league (which I participated in for eight years), and then participating in PPC matches for another ten, I've always had kind of the opposite problem. Later on, when I did some IPSC and IDPA shooting, my accuracy-centric roots remained evident with nice groups produced at not-so-blazing speed.
Oddly, later on when I shot some IDPA matches with my PPS M1, the fast splits looking over the sights at seven yards and closer began producing some decent results. I have attributed this to how well the pistol fits my hand as I struggle to match the fast-firing results with larger pistols.
I suspect my brain became hopelessly hard-wired for accuracy over speed from the beginning. Whether that's an advantage or a liability in more serious circumstances will hopefully remain to be seen.
The utility of that mindset cannot be over-stated.