Yes, the greater the distance between sight posts, the more precise your aiming will be.
I'm not thinking this works with the red dots. Red dot = Point and shoot. Your irons are there for a back up sighting system. Although some do chose to co witness the irons and red dots (everything in a straight line) I do not. My Aimpoint co witnesses with my standard front sight post. I mount a ARMS #40 rear flip up to use in case of an optic failure.
The farther you mount your Aimpoint, the easier it will be to shoot with both eyes open.
Try this little excercise:
Place your finger about 4" in front of your face. Now focus on it. Kind of hard to see your computer screen clearly is'nt it? Now, while still focusing on your finger, move it out towards your screen. You should gradually see everything come into a mutual focus.
Your finger is your optic, and your monitor is your target. Ta Daaa! Forward mounting.