inside google adwords you have a invalid click rate,
right now i have cca 13% per search campaign and 70% display from the start of this month till now, im sure thats not everything because for some time i tracked those invalid clicks from my side and those where bigger then what google reported. its frustrating but i can hardly do anything.
In some cases you'll see that they leave your page immediately- too fast for a human to process that it's not what they want if they've actually clicked on an ad. Like, one or two seconds.
One or two seconds sounds pretty long to me. I think I close accidental ad clicks well under a second a lot of the time as I realize what I did without waiting for the site to load.
Yeah I do that too but I don't want to pay for those clicks either. I want genuine interested clicks. Google is set up to get me to pay for clicks, not to give me the right clicks.
Or at least it was when I used them. It's been a while because of that.
It is totally too quick if they are looking for content. If they are looking for a car and click on a lumber store then I agree. But anything other than a clear mis-click and you can't absorb the page that fast.
Another tactic I'll use is actually parse thru apache log for adwords clicks looking for duplicate IP's. File a complaint with google to get a refund if I see patterns of abuse.