The best part of that interview is that he was clearly concerned about dynamic range being lost at low ISOs. This seems to suggest they are taking DR very seriously. I could see this coming in at 12 stops over the 4:2:2 ... a bit like the C300.
I'm not seeing much increase in dynamic range at all. Even in the stills on the panasonic website there is highlight clipping all over the place [url="http://panasonic.net/avc/lumix/dslm/gh3_special/gallery/index.html"]http://panasonic.net/avc/lumix/dslm/gh3_special/gallery/index.html[/url]
Rumours talked about a high dynamic range sensor, but this looks like stealth marketing. The only reference to high dynamic range on the website is a multi exposure hdr mode for stills. No flat mode for video, although you can turn the contrast down which may do something.
As far as the multi aspect sensor, I don't think it is one. By looking at the pictures of the cam without the lens mount the sensor clearly looks smaller with black borders all around, and as already pointed out the horizontal resolutions on the website are 4608 for all aspects. Both of these things strongly indicate a regular sensor.
I think dpreview made a mistake. They probably saw the different aspect ratios and just assumed panasonic wouldn't go backwards on such a good feature, so they just copied and pasted the sensor stuff from the gh2.
