When I lived in Austin in 2006-2008, the traffic was atrocious, and it's only gotten worse in most areas. That city has a particularly profound infrastructure expansion problem, and the high growth has only exacerbated it.
Yes it's a common troupe, like in portland or seattle, that Austinites don't want more people, especially Californians, migrating in.
But come one come all! We have plenty of space and opportunities.