I'm also getting hit by this (have been since the 21st). It appears to be focused only on my index page.
- vast majority shows as IE9, but there is some 8 and 7.
- peaked on the 21st then slowed down a bit, but has hovered at around 2500 hits per day
- impressions don't show in google adsense
- but, I strongly suspect they're affecting google adsense in some capacity; my eCPMs and income *significantly*, undeniable drop since the 21st. [By approximately 75%].
- this sucks
Wouldn't that be nice.