Based on a new study released yesterday, consumers could rightfully say that the Department of Transportation didn’t do them any favours by imposing the three-hour tarmac rule that became effective in Apr-2010. For the first time, a four-month-long study from Airline Zone Co-Authors Darryl Jenkins and Joshua Marks, both former executives with the George Washington University Airline Institute, has quantified the impact of the new rule, finding far more passenger disruption from increased cancellations occurred in the first month of the new rule, than ever happened with protracted delays prior to the rule.