If it had anything to do with the urban environment of Dallas, they could stay in LA. Corporations move strictly due to taxes, incentives from the city and state, and cheap labor. I know a very good friend that is GC of a large corporation moving to Dallas from San Diego. It certainly doesn't have anything to do with anyone actually wanting to live in Dallas. They plan to lose a lot of the staff who refuse to move and restaff at 1/2 the cost.