I've had waits in both ORD and IAH. Neither was more than 10 minutes. At ORD, there have been issues with "crowd control." Folks sitting down at dirty tables without talking to the host, and then getting irritated because they were there "first." Several times I've gotten a bit frustrated at ORD simply because they still don't seem to have a process for figuring out who is next on the list, or keeping folks from simply sitting down when there is one.