I drove over there today, and it is indeed running 4G.
YEA!!! First south OC LTE!!!!
I got around 20mb down, and 6 up sitting in a parking lot in the general area. I ran sensorly, and it is now live. I only drove around a little bit, so I am sure the coverage is better, and someone else will get a better sense or where the 4G is over there.