From the Raleigh observer:

"You're not just imagining it. The eastern Triangle's growth is officially smokin'.
The U.S. Census Bureau says the three-county Raleigh region was America's third fastest-growing metro area from 2006 to 2007 by rate, at 4.7 percent. It was also the 12th fastest growing by number of people: 47,052 -- or almost half a Cary. That's for Wake, Johnston and Franklin counties."

Read more here.