lucy24 - 1:25 am on Feb 22, 2012 (gmt 0)
The additional traffic looks human at first glance - it is captured by Google Analytics, It comes from diverse consumer IPs in the US and Europe (but not Asia), and the bounce rate is high but one out of ten visits or so loads another page.
Is each page request accompanied by requests for all associated files-- css, images, favicon? That's my absolute criterion. Matter of fact I'm still hammering out an alternative ID for mobiles that don't get the favicon. It even works on 403s: humans get the error-page stylesheet, robots don't. Come to think of it, the CSS might be a better criterion for some pages. Except, blast it all, the page that was intentionally made with nothing external. ###