Scheduled delivery date is never correct....based on prior experience with samsung promotions most devices are delivered 4 to 5 days after scheduled delivery date...your label is made but no true movement but at least you know it's getting shipped.
It may also depend on your proximity to the shipping location, obviously when something is shipped ground, the closer you are, the quicker it will get there. I just checked, I got the email saying my Gear Fit 2 had shipped on August 31st, and it arrived on September 2nd. I can't remember for certain, but I think that was the scheduled delivery day; I've had issues in the past with FedEx and scheduled delivery days, so I was happy when it actually arrived when it said it would. It shipped from Indiana, and I live in Nebraska, so that's fairly close proximity, so where you live may make a difference, if they all ship from the same place.
My Gear VR shipment is coming from the same place the Gear Fit 2 did, so hopefully the shipment time will remain roughly the same, and if so, it should arrive by the scheduled Tuesday or maybe Wednesday.