You have completely misread this entire thread. The OP is talking about USB 3 data transfer rates. Currently all iOS devices except for 12.9" iPad are USB 2 data transfer speeds. The OP wants to know what the iPhone 7 is.
Exactly. There is an underlying TRANSFER speed with devices that caps out at either USB1, USB 2, Firewire A/B or USB 3 or Thunderbolt (& newer USB 3.1 + Thunderbolt upgrades) Speeds depending on the WIRELINE protocol it uses.
30-pin, Mini/ Micro USB, Lightning, USB-C/A/B are just old & new varying "connectors". They are changing as well and do support the above mentioned WIRELINE protocols, but they are the the DEFINING items, they are just a MEANS to and END.
The Wire & Wireline protocol system (& relevant chips) are what define how the devices communicate. The connectors are changing, but they are not the drivers.
So, please get clear on CONNECTOR vs WIRE PROTOCOL (& supporting chips).
When you try to transfer GIGs for data from a laptop to External HDD, do a comparison between a USB2 (port + Drive) and USB 3 and you'll realize how quickly data can get transferred.
Which is why its atrocious that it took the entire night ( 12-14 hours) (maybe more / entire night) when I RESTORED from BACKUP an iPhone 5 in 2015. I am wondering the PAIN of doing that with a 128 or 256 G device.
PS: I dont think we need to wait for a teardown. Put in an APP like Documents 5/ VLC that allowed you to dump bunch of large files. How fast they transfer should be able to tell us if the Wireline protocol is fast enough.. whatever it may be using - Of, course its to be done via a tested & reliable USB 3 port on a machine.. preferably both PC and Mac.
So, if anyone can get this post out to some EVALUATORS, we'd love to see results.