diddlydazz - 1:59 pm on Oct 16, 2013 (gmt 0)
We got a boost from the Oct 4, Penguin 2.1 update. Then another boost on Oct 14 (our competition got dinged). The boost from the 14th ended on the 15th for us though. Not sure if this relates to what everybody else saw.
likewise on one site, except the boost on OCT 4th - traffic up on 14th and then dropped on the 15th. traffic dropped again 16th (today) to lower than pre OCT level