Click Fraud Not So Bad?

Google claims it has discovered some key flaws in the way that third-party research firms have been estimating click fraud statistics, and as a result, the dire click fraud numbers we’ve all been seeing are exaggerated.

...Google says that many research companies don’t count actual clicks, but estimate the number of clicks by other factors like the number of repeated page loads, which can simply be the result of a user hitting the back button on their browser or visiting the advertiser’s site multiple times. Google also says that research companies that use cookies to track users may actually attribute clicks that are made on ads for one network to another. In other words, if a user clicks on a Yahoo ad, the click may be attributed to a click on a Google ad. More...

I don't buy it. I check for click fraud and it is really easy, you use click-tracking software. A "research company" surely wouldn't be stupid enough to make such mistakes. Click fraud is where you get less clicks than you pay for, not more!