Meh, I was hoping some kind of dim OLED MIP display that would display always, like in N9 (though I did notice it was not mentioned in the specs) - it would have explained why most of the clock displays had dark background.
There are accelerometers that can queue many samples and then pass them to the CPU in one go (ie. 100 samples) and in addition they can have thresholds for interrupts. If your CPU is going to be woken once a second - assuming 100 Hz sampling rate, which is quite nice - then it doesn't really sound that bad, unless you have bad power saving functionality either in the CPU or in the operating system.
I suppose BLE doesn't need to take that much energy either if you grant a few seconds latency from notifications to actually displaying them.
There's always hoping they can improve the battery usage with firmware upgrades..