I've noticed some erratic behavior in the last 24 hours. My pure whitehat websites dropped like a rock, and my crappy, unattended websites shot up to #1. I checked for neg backlinks, nothing. I keep everything tip-top, from hosting, to page speed, to content, to backlinks. Out of nowhere, traffic on two of my sites dropped by 60%. Most popular keywords dropped from page one to page 4-10. My question is to people who have sites that mostly rely on Google, did you notice any changes in the last 1-2 days?