I'm counting on the IUP preapproval to get me through quickly. I'm going to get up about 10 minutes early and go sit next to my router with my phone. Then open, close, open repeat as required until it pops up.
From your phone on the app and in bed and you're going back to sleep? Then 2:50 - 2:55 is probably fine. If you need to order from a computer, in another room and/or leave not to disturb a SO, then a few more minutes might be necessary.
I'm ordering from in bed, on the phone and hopefully going right back to bed. That's if there isn't too much adrenaline pumping through me. I'm getting up at 2:50 EDT.
This will be the biggest ever iPhone launch. Tens of millions of people are going to be trying to win the iPhone X lottery. I hope all of us MR members will get what we deserve, because we are the most loyal and passionate Apple customers.