Answers come from comparing the Census Bureau's just-released estimates of metropolitan area populations in July 2012 with the results of the Census conducted in 2010.
The focus here is on the 51 metro areas with populations of more than 1 million where 55 percent of Americans live, most of them of course not in central cities but in suburbs and exurbs.
Two growth champs stick out -- Austin and Raleigh. A half-century ago, neither of them amounted to much.
The counties now in metro Austin had 300,000...