IMO a higher hinge pin will give more grip with rubber tire on carpet. My thought with the type r on rubber is the stiffer you go (springs, bars, rollcenter) and the flatter the car stays, the more sidebite it will have as the tires will have the weight of the car forcing them into the track, as opposed to having alot of body roll and a lazy car. For rubber i always run high front pins, and play with the rear a bit from none to 3 #4 washers. The issue is that with a higher rear pin, my car tends to traction roll on high bite carpet, so i usually run it as high as is comfortable to drive.
Disclaimer is i run very little on pavement, so i have no idea if stuff does he same thing...consult Larry or Jason for that.