On my bigger sites it did, but only slightly. I used the free time in the holiday to advertise some sites though, and their traffic increased. It should grow after the holiday season even more
Yup. One of my forums had about 1/3 as many posts as usual for a few days. Another one, not well established, went completely dead- but picking up now.
We saw the same thing. Our Sat/Sun income typically drops by ~30% but this past weekend it was down by ~50%. But, its back to normal now...