It was I who got this issue escalated to engineering. I am the original 2010 floating blacks bitcher. I'm really glad you called and complained about it as well. Now we are two.
They escalated this to engineering (supposedly) over a week ago. I have still heard nothing back.
I was reading some threads about how all this works, and it doesn't sound promising. It sound like an energy star issue. Something about cutting initialization cycles from 2 to 1 below certain levels. Evidently that cuts total power output and makes them have that pretty energy star rating, but then causes an adjustment lag time. I have no clue, I'm paraphrasing (poorly) what I read some tech type guys writing in the floating blacks thread. My fear is this is not going to be fixed by firmware, which really pisses me off. If I return my G20 to Best Buy this week, I will go home without a replacement, because as I understand it Panasonic's entire 2010 plasma line has this issue. I've been reading up on this in older Panasonic threads. In the past people have made a huge stink over it and customer service came out and replaced panels and power supplies, etc, etc. This is not a new issue. It's frustrating Panasonic is playing dumb. They know exactly what their set is doing and why, and they aren't going to give us a damn thing until after their 3D line is sold out. When they do, it will be "The set is doing what it is intended to do under normal use. This is not a warranty issue."
Samsung, here I come. Hang in there till May, boys.