Shepherd - 6:07 pm on Apr 29, 2013 (gmt 0)
Haven't really looked at the number of keywords sending traffic. This is a pretty specific niche with about 50% of searches being for the main keyword (example), 15% of searches a secondary keyword (example widgets), and 35% coming from all other keywords (alabama example widgets, texas example information).
We have the emd (example.com) and use directories for the secondary keyword and longtail keywords (example.com/widget, example.com/widget/alabama, example.com/information/texas).
Our traffic has remained flatlined from the day after penguin hit to this day, no increase, no decrease, 40% less than the day before penguin hit.