Also impressive is that ISO 1600 is relatively "clean" and noise free.
On the G5 sensor, Amin Sabet over at mu-43 did this piece a few days ago. The sensor in the G5 is apparently the same as the GH2 with the multi-aspect options disabled.
There was a piece about an interview with some Panasonic people featured in 43rumors here, in which this was stated - "G5 can be considered as a sort of “GH2.5″ according to Panasonic." and this doesn't seem far from the truth from what I'm seeing. What we probably have with this camera is a "consumer" and cheaper version of what is going to be appearing in the GH3, which seems to be both Panasonics answer to the Olympus OM-D and their attempt to provide what, for want of a better description, is their version of "pro-spec" m4/3.
If the rumours of weather-sealing, battery grip, video out connections, new sensor with improved dynamic range etc. are true then we should be getting a pretty impressive camera. For those who don't want and / or need all of this and in a package that doesn't command the premium price that I'm sure the GH3 wil have, then the G5 seems to be aimed very much at that market. As it is, the G5 is very much the best Panasonic m4/3 camera yet from what I'm seeing. However it just makes me even more keen to get my hands on a GH3. But if things pan out like they usually do with Panasonic, that shouldn't be until around December.
CLICK HERE for my ongoing Review and User Experience with the G5
N.B. to see more on the cameras and lenses featured in this post click on the relevant labels (tags and keywords) below.