Government agencies typically have up to three days to respond to FOIA requests. The three days do not include holidays or weekends. Columbus Day, IIRC from yesterday, is a federal holiday so it wouldn't be counted against the agency.
Ah, I didn't even look at the story or the thread, just answered your question. This is Texas, so its going to fall under Texas laws, presumably. I would suspect that Texas did not take Columbus Day as a holiday, I know most Georgia counties did not.