joined:July 30, 2003
Since Google started showing Invalid Clicks Rate (ICR) as a reporting option within AdWords, I've been monitoring ICR on my personal AdWords campaigns (all political in nature). In my case ICR's have tended to fluctuate between 5.5% and 9.0%, for campaigns where content bids are ~1/5th search bids and still accounting for ~40% of total clicks.
I'm not sure what the AdWords T's & C's says about sharing ICR data, but I would love to hear from other advertisers what their ICR is. Anyone else want to share?