Don't be surprised when a stranger on the street smiles and say 'good morning'. I have two sales people (both female) that are online dating.
Okay, you can be surprised but it's going to happen. From what I gather from them, there are some catches in Dallas, but you might have to weed through a lot of douchebags here.
Dallas has a lot of churches and you'll encounter a lot of Christian values but no one is going to have a problem with your religion, as obviously you don't yourself.
And as txgolfer130 says, there'll be personal interaction.
Online dating brings singles together who may never otherwise meet.