I'm so glad I'm getting mine at the store..... UPS does not deliver on Saturday in my area; and, if they did, it would end up left on my doorstep in plain sight for all manner of thief and passer-by to steal!
This shipment requires a signature. In fact, the shipment e-mail I received from Apple asked if I wanted to "pre-sign" electronically. That allows UPS to drop it at your door without a signature. Otherwise, you're required to sign.