"This census will have advertisers and marketers focusing much more on the segmentation within the Hispanic market," says Julio Rumbaut, a media consultant in Miami. "The population has become much larger, unquestionably. But it's also become much more diverse." Ad spending for all Hispanic media soared 164% from $1.47 billion in 1999 to $3.88 billion in 2009. That's more than four times faster than the population), according to ad-tracking firm Kantar Media.