Here is a snippet from Slash Gear's website with the launch day/pre-order info for iPhone 6's. You will experience the same thing:
If you’ve pre-ordered your new iPhone, things will go pretty smoothly. You already know that you can pick up your device at any point on Friday, so the whole “take a day off work to stand in a queue” isn’t a concern for you. So long as you make it to the store on Friday, you’re fine.
When you get to the store, there will be a line specifically set up for pre-orders. Have your order info ready, though, as store employees will ask to scan your “Ready for pickup” barcode. Apple says they’ve seen a record number of pre-orders for the iPhone 6, so be prepared to stand in line for a bit.
Why are you standing in line after pre-ordering your iPhone for pickup? After Apple Store employees verify your bona fides, you’ll be escorted individually to the Genius Bar to complete the transaction. There, employees will ask if you need a Personal Setup, which is a one-on-one for getting your new phone up and running. If you don’t want that, the employee helping you out will tell you about their various workshops before you leave.
Here is the link to the article:
http://www.slashgear.com/what-to-expect-when-you-pick-up-your-iphone-6-16346507/
Be sure to bring any info outlined in the email you receive.
I'm thinking it is much like making a Genius appointment. I had to take my Mac into the Apple store here in Maine, and I made an appointment. There was a line of people. The ones that didn't have an appointment were told they would have a 2 hour wait minimum. I was escorted to the Genius Bar for my appointment pretty much right on time.
Best of luck, and have fun!!! 🙂
GB