Lately, there's been a downturn in the ad market. Even online advertising isn't growing as fast as it used to. But don't expect these macroeconomic trends to effect Google's second-quarter earnings report today. Google isn't a bellwether for the economy, CEO Eric Schmidt told reporters in Idaho last week. "We make our own weather," he said. With those remarks in mind, we'll let analysts like Citi's Mark Mahaney — who created the useful cheat sheet above — tell you what kind of numbers to expect today. Our forecast for today's earning's call instead? A downpour of arrogance and gutters full of gloating.