OK if first and club would all borad at the same time but I know from experience that they don't. If they held you till everyone was ready you would complain but there are not enough busses for you to have one each!!
Its not perfect every time we fly but we all expect it to be so. It matters not what you pay. You are paying for better food, bigger seat and a better lounge but the service should always be the same regrdless of class.