Back in my day, Plano was farm country, and Southlake didn't exist (or if it did, I'd never heard of it), I knew more pi phis from towns like Tyler
I went to SMU, was in a top house, and we let transfers in all the time. I knew girls who transferred from SMU to UT and had no problem affiliating either, but most who chose to transfer to Texas after starting at SMU had gone to school with many of the girls in the house they were transferring into.
Just shows how time has changed the landscape both in the Greek scene and in the cities!!