There was a team at Grand Rapids this summer that was using DO. while they didn't score in chicken, they did win ribs I believe... I don't think they cooked their ribs in the DO though...
Honestly, they were too busy the whole time... they made me exhausted just watching them running around. So my guess is it is way too labor intesive for a BBQ comp. As I know I don't have that kind of energy for a Saturday morning... Which is probably pretty obvious, as that is why I have 2 FE's...
FROM SEA TO SHINING SEA BBQ TOUR
Red Jambo one off
Homer Simpson 22 " Weber Kettle
Red 18 1/2" Weber Kettle
Black 26 3/4" Weber Kettle