Double Your Money w/Google? ...I doubt it

Google recently claimed to have generated $54B in economic activity last year in the United States. In coming up with this figure, one of their assumptions was that for every $1 spent on AdWords advertisers generated $2 in sales. I just don't buy that. There are way too many crappy ad campaigns out there, often without even an action on the landing page. The prospective customer is going to have to be pretty proactive if they don't have a clear action to take. Most advertising just seems sloppy and I suspect has a negative ROI on average.