Ya, me too. It's DR at low ISO where M43 suffers for some of my shooting. If this holds up, it's good news. The OM-D is nicely specified. I don't like the DSLR shape, and prefer not having to look at a screen to see my settings, but it's the final output that will decide me.
In my shopping it's up against the Nex 7 and the new Fuji.
Olympus mentioned about 33% (as far as I remember) at low ISO, which is just a third stop. If it is the sensor of the G3 (or an improved version of it), which I expect it to be, then this is quite reasonable.