I think it depends a lot on the intersection and the traffic patterns. There are factors that you can't show in any diagram -- like, suppose there's a Dunkin Donuts right after the left-hand turn, and a ton of cars turn in -- is the far right of the left-turning lanes the best place to be in then? Maybe not, in that case. I have a situation like that on my homeward commute, and I get to the far left of the left-turning lanes. It gives cars plenty of room to pass by me on the right as I turn, and keeps me out of the way of the cars that are turning right immediately after the intersection.