Saying that raking the rudders forward doesn't reduce weather helm is just being picky to cause confusion. It doesn't change the interaction of the rig and the resistance to side force, but it sure as hell changes the boat's need to round up, or weather helm. No, they took the term away and gave us tiller tug.
David, but that's just the heart of the matter....
What you feel on the tiller ("on the helm as a helmsman") is the tug when you want to correct the "weatherhelm".
Raking the rudders forward only increases the rudder leverage on the tiller. So it makes it easier to correct for weatherhelm.
But it doesn't take that away. So formal said: rudder rake doesn't influence weatherhelm as a phenomenom. It helps coping with it (or make it worse handling).