mhansen - 4:51 pm on Dec 2, 2012 (gmt 0)
This isn't the first time you and I have noticed identical patterns between our Penguinized sites! Very interesting - glad you noted it.
We dipped from the 21-24th, but assumed it was just holiday related. Came back strong for the full week after, but yesterday (Saturday) we saw another big drop. Today... the site may as well be shut off.
Oddly, traffic from "Other than Google" search engines is steady. The drops are in referrals from Google only.