Had a similar experience July 5 this year in Atlanta. Plane going to Santiago, Chile had electrical problems after we boarded, had to get off and wait a long time, and evetually the flight was cancelled and we were sent to a hotel. A new flight (unscheduled) took us out the next morning. An unexpected bonus was being able to see the Andes and western South American coast during the day, since the scheduled flight was at night. My traveling companion and I are both GM. We each received a letter and a voucher for $150 toward another flight. It did help soften our feelings re some of the things that could have been handled better. We have been wondering whether Medallion status has any influence on how they handle such events and have been hoping to see more responses to this posting.