Problem is, as usual, the inexperienced users of fast track. It is often like bunch of cows wondering about a new barn door. Not knowing what to pack to cabin luggage, not taking the belt off, wearing burkha, etc. Has not taken more than five minutes most times though. This would be a perfect spot to punish those having too many pieces of hand baggage, by sending them back to check in to learn the basics of proper airport/aircraft behavior. The fast track keeper does not always believe what is printed on the boarding pass. Have to have the shiny card available.