I have 3 main sites I use that were all ranking #1 for their keywords. Two of the three sites are still ranking for their main keywords. The other site bounces around from 1-3 for its main keyword and then lands on Page 2 for it's alternate. My most visited website prior to Penguin averaged 2,500-3,000 visitors per day. Today it is about 1,000 visitors per day less. I checked my analytics and it looks like prior to Penguin I was getting a lot of traffic for long tail keywords and keywords I never tried to rank for. I noticed this across all of my websites. Has anyone else experienced the same thing?