I noticed the same thing, hair trigger. I'll have to try decoupling the focus from the shutter button and see if I like that. That is, if I figure out how! I've sure taken a few pictures I didn't intend on just yet!
I really love the tone and color of the images the D7000 produces. They look very different than my D300 images. And the low noise at high ISOs shocks me when I look at them.