I am a long time inside the hub package sorter and veteran of many peak seasons. I read all the newbie posts asking questions about working for UPS. In person, I try to give advise and tell them tips on how to work smart and safely and earn respect of your fellow workers and sups. Almost half quit after 2 weeks and most of the others can't keep up with the pace. The people who survive are mostly older and mature and have families . They want to provide health insurance for them. That is my observation.