outerlimit: On a defensive gun, I understand your thinking. It sounds like you're referring to FO sights that have FO, two-dot rear and FO one dot front. I agree if so.
Have you tried black rear with FO front. Your eye immediately draws and sees the front sight on your target. Front sight, front sight, front sight
Gunfighter123: I agree.
I'm in my 60's and shoot production class.
For me, FO is way faster sight acquisition for run and gun and steel. Changed my front sight to oversized (taller) FO and then filed down the metal so the top of the FO is POI at 25yds.
Metal is paper thin above the FO rod.
With minimum light, it's like normal black sights.
9mmepiphany: Your right about precise shooting. My bullseye target .22 has all black target sights and it will shoot very tight groups---not just because it's rimfire---but with precise sights. BUT, as far as speed goes, FO lets me/most people transition to multiple targets faster, especially with centerfire.