Okay. So the slow motion is very cool. It works the opposite way that I expect ("40%" means overcranked, not undercranked) but it does work nicely. It sure is nice to be able to shoot in slow-motion again.
Furthermore, high ISO's work well. A 6400 ISO seems actually usable. And the close focus on a f2.8 zoom lens is pretty phenomenal.
The noise performance seems to me to be very commendable. This particular brick wall is the sort of thing that drove the GH1 to distraction.
One of the other big improvements the camera has is that apparently (at least when shooting in Quicktime/.mov format) it assigns unique file names to each shot which don't get reset until the camera is deliberately told to reset them. This is a big deal for our file management as having all these dang files named exactly the same thing is pretty frustrating. We'll see how that goes.
The video image is still not happy with very low light. It gets grainy, and not in a good way. So, you know, we'll still have to actually light stuff.