ken_b - 9:44 pm on Aug 15, 2013 (gmt 0)
with Panda? With Penguin
Looking back, except for Panda 1 it's been a long slow decline since early 2010. Panda 1 essentially instantly cut my traffic by 35% which turned into 50% by the end of 2011.
I'll have to look for a list of Penguin dates to correlate that, but I don't recall any immediately noticeable impacts from it.
And part of what confuses me is the slide in traffic from Bing and Yahoo that more or less has happened at the same time as G, although at a somewhat slower rate of decline.