I'm still getting to know my D7000 but after 'playing' with it yesterday I was really impressed. I was in woodland in a grey and wet UK November and shooting hand-held.
I wanted a deeper DOF to capture the patterns of the trees in the distance (f8/f11) and wanted at least 1/125 for shutter speed to eliminate my own camera shake when my big old sausages snatch the trigger
In the low-light conditions this wouldn't have been possible for me in the past but at iso 1600-2500 (and higher) I still got some good results. These were mostly landscape/scenery shots so I don't have to crop but noise doesn't seem to be an issue even when zoomed in.
I like having this 'A AND S Priority' mode it's really amazing what technology can do these days. I remember when using film that 800 iso was fast! We are quite spoilt these days.