For my purposes, metering is *not* rocket science.
In the modes I typically work, birds in flight I usually meter the ambient light and shoot in manual exposure mode. Landscapes, ISO & aperture are fixed, so metering comes down to the simple, 1-dimensional question of what is my shutter speed, and because my subject isn't moving, I have time to check the histogram and re-shoot if the meter got it wrong.
So, for me, I don't believe I benefit at all from an advanced scene detection mode.
However, as Stan points out, some people have much more complicated metering requirements. Add in flash and now you're metering and executing 2 different exposures (ambient and flash). If your subject is moving, then you don't get the chance to re-shoot. So for some people, I can see 91K being an advantage.
I guess it depends on your needs. I wouldn't even blink at the D600 scene detection system.