Reviewing the Apple web page http://www.apple.com/macbook-pro/specs/ Tech specs you will note it says Two Thunderbolt 3 (USB-C) ports with support for: Charging DisplayPort Thunderbolt (up to 40 Gbps) USB 3.1 Gen 2 (up to 10 Gbps) Now if one pulls up the Apple+Option -> System Information... you will note that the two Thunderbolt ports are rated at 20 Gbps and not 40 Gbps. Thunderbolt 3 is 40 Gbps and not the stated 20 Gbps. I was in Apple Store today and discussed this wording with the Genius/Sales/Manager and was told.... "It's OK as it says (up to 40 Gbps)." IMO, it's deceptive of Apple to state these two ports are full Thunderbolt 3. This support document describes those low-speed ports: https://support.apple.com/en-us/HT207256 This doc states... MacBook Pro (13-inch, Late 2016, Two Thunderbolt 3 Ports) delivers full Thunderbolt 3 performance on both ports. which is incorrect as they only provide Thunderbolt 2 performance of 20Gb/s.