I think the fact that your numbers are so much drastically lower than the manufacturer’s numbers indicates that your numbers are not representative of the typical experience. Maybe you can dry your hands in five seconds with the typical air dryer. It’s clearly not true for most people. Maybe you shake your hands extremely dry before going to the dryer. Maybe after using the dryer your hands are still wet and clammy. I don’t know. Your experiences are clearly not reflective of the typical case, though.