I posted that survey for information purposes - particularly b/c the top corps were all in different cities. However, I do think the influx of $$ in N.TX will increase influence.
More spending power by consumers will spur projects, enhancements, etc. Small localities are trying to figure out how to spend their "found" money.
Would be interested in the figures for Houston vs. Dallas (or DFW Metro) if you have them.
I guess I was not sure of the point you were trying to make? Take ExxonMobil for instance, their HQs are in Irving but most all of their R&D is here in Houston.