I'm still seeing hourly roller coasters. About every 6-12 hours things shift.
For the first time today I saw weird keyword referrals. I track our usual top 20 search referral terms. Every day they are about the same, just shifting positions. For HALF of today (so far) there were terms that aren't usually there. Valid -yes - they landed on pages that satisfied those queries - but not our norm.
Pageviews per user was WAY down during the low period this morning but picked back up as Google referrals picked up through the day. Referrals are again wearing off now this evening and sure enough, pageviews per user are dropping. Is this the "zombie" traffic that others have referred to in the past? This is the first time that I've really noticed this sort of activity on our site.
Also, our gbot spidering is finally down today. Doesn't mean it won't pick back up but we had over a week of intense spidering. Another first.
I can't say whether we've been hit or helped by this update since things keep shifting! Yesterday looked like we'd had a boost, today looks like a bust. Same pattern the days before.