Bag checks these days while probably still advisable to at least have some pockets open you just walk through a detector at normal pace so the days of everyone going to a table to have their belongings checked have been gone away with for a few years now.
It's only if the detector is set off that they will pull you aside to have a secondary check where they actually go through your belongings, you not having zippers open doesn't do that. Because of this the backlog of people is fairly low def. nowhere near what it used to be. People with strollers or wheelchairs or
ecvs usually they only want one person to go through with them with the rest of the party going through the regular walk through.