Equivocal
I don’t recall if ORD and DFW do PRMs. ATL does for sure though.
It really is a simple system. I’ve been in and out of those airports multiple times. ATL is by far the most civilised. ORD is my least liked of the three. There’s just too much going on there.
As to the parallel runway ops, it really is a non-event. Comply with instructions promptly, and don’t overshoot the runway. Have your thumb on the red button for the inevitable time the AP does something stupid.