The trend on traffic on my site has been gradually upward, but not nearly as far upward as the Nikon 1 announcement seems to have taken it.
Say what you will about the camera, there's a tremendous amount of curiousity about it. My site hit a new peak in daily visitors yesterday, with over 21% being new to my site (welcome; I'm [mostly] friendly ;~). Even the D7000 announcement day didn't top the Nikon 1 announcement day.