I don't think Flottum is talking about packages when advocating a five day wait to pull the cork in a queen cage. No reason for that. In fact I've had good luck direct releasing the queen when installing packages. Flottum is probably talking about requeening, in which case a three-day wait may be reasonable depending on the hive situation. Sometimes leaving the cork in for a few days and then checking to see if the bees are biting at the cage or are acting friendlier will help you determine if there's still a queen somewhere in the hive.