There have been times when Apple has used new or non-standard connectors over the Mac's history. In many cases it was out of NECESSITY: FW400 could handle 30FPS 720p HD video RELIABLY - USB 2.0 couldn't. ThunderBolt could handle fast streams of disk drive data AND 4K video simultaneously - USB 3.0 couldn't - but the emerging USB-C USB 3.1 spec can.
Apple adopts industry standards when it can, helps to influence emerging ones when it must, and creates new ones when other's haven't. No more, no less. Change Is Constant in the world of computing. Over the next decade SuperSpeed+ USB 3.1 will consolidate many different connectors and interfaces (both power AND data) into one. It'll even carry ThunderBolt protocol. So if you want a 'winner' in the X VERSUS Y imaginary battle: USB is it.