I live in Dallas. We're growing massively, but honestly, I haven't really noticed too many changes in my day to day. It takes just as long to get somewhere as it did 5 years ago.
Because they were large, spread out cities already, the highway infrastructure, suburban development, and local planning have all been optimized to support that reality. Austin tried to keep that smaller college-town feel, which was hip and trendy and cool for visitors like SXSW, but is now leading to the awful growing pains they face today.
I think Austin has the potential to be a really great city, but it's gonna take decades to get anywhere near that reality.
In the meantime, Houston is building another loop, Dallas is extending the DNT practically to Oklahoma, and Ft Worth has a shiny new tollroad on the west side of the city. They'll keep absorbing growth while Austin struggles to get organized. Unfortunately, many of the people flocking to Texas don't know any better so they go to Austin first.
My 2¢.