FINALLY! I remember seeing mention of the change of law a while back (couldn't find the thread to update it though), but they've been customarily slow to actually make it happen, but today for the first time I got charged half price on the cuota section of 200 between Manzanillo and Tecoman. It looks like they finally made the change. I can't say if it's in effect nationally yet, but as of today it is here in this corner of Mexico. Wooooo!