First thought would be the 02/03 team. They were superbly efficient at breaking especially with pace with the likes of Hughes, Forster, Harper etc with energy to burn. Millwall away 2003 springs to mind with the first goal.
Certainly under Coppell we were also effective, helped by the superb use of multi-ball system. Under McDermott not as much so, certainly we were more direct but not as much counter-attacking.