Yes, but the devil is in the details.
Aaron Cowan’s experience is different and suggests RDS is better for newer shooters.
https://1312bba5-e7e7-76e8-1fca-a01b...4a0c1370c2.pdf
So who is right? I believe it’s in the metrics and test design.
I think a big caveat is when new shooters insist on trying to find the dot when index would be good enough. That can lead to dismal test performances.
I believe that training with RDS gives better feedback (like an immediate Mantis X) with trigger press and index than irons to someone with bad eyesight or who isn’t really knowing what they should be looking at.
If you get good mechanics with presentation and trigger press, the sighting system is a minor difference. Shooting RDS helped my irons. Shooting irons didn’t help my RDS nearly as much as the reverse.