TFA mentions this update happened weeks ago. How are you able to pin this down to the hour and correlate your traffic changes to the algo change if we don't know when the algo change happened exactly?
Shift happened weeks ago, since then I am waiting for any kind of update from google about the algorithm change. Also I am not arguing what time they have deployed the new algorithm, I am just saying that the traffic shift happened in a matter of hours.
I think I saw Hummingbird happen to one of my sites, but my traffic shift happened over the course of 5 weeks, with a steady ramp up in traffic. Very different from the near step-function you saw.
TFA mentions this update happened weeks ago. How are you able to pin this down to the hour and correlate your traffic changes to the algo change if we don't know when the algo change happened exactly?