Well, I was all psyched up to be offended, but find myself in total agreement.
We don't have the markings you describe, here in Kansas City, but the principle, if I understand it correctly, coincides with my practice of moving over to the very left of a right-turn+straight-ahead lane, to enable motorists behind me to go ahead and turn right after a stop on red.
I will wave them through with a look back at them and a nod of the head and a magnanimous sweeping gesture of my right hand; perhaps one out of five will take advantage of the opportunity.
I've been reconsidering my chivalry because every now and then the car behind me will charge on ahead when the light turns green again, trapping me between him and the car to my left. I tend more often just to take the entire lane now, because of this unpredictable behavior.
Where I don't want to be, is at the extreme right. Caught there once or twice on a sudden red light, I've dismounted, moved to the sidewalk, waited till traffic cleared and then started up again.
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On leave of absence as of March 13, 2002. Contact by email.