A further confusion. Sony seems to have no mention of "Local Dimming" here. Instead they are referring to "Frame Dimming" (which is something that I believe most folks could not STAND about Samsung TVs----so I'm hoping this isn't the same thing), and "Dynamic Edge LED Backlight". The latter sounds like a variant of local dimming.
Note also, that both of these things are lacking in the R550A models.
Well vinnie97, one of the kindest and most helpful and respected members here, was banned for silly reasons. And now vinnie_RIP is banned as well. The mark of an inexperienced moderator is to forget that their role is one of resource, not one of petulant authority and further that the members are doing the forum organization a favor by being here, not the other way around. They know darn well they screwed up here.