Faster Syncing?

Loving my new 6+

I always set up my iPhones as New to force me to clean out the crap I don't actually use by starting over. While adding my music to the new phone it seems to transfer data MUCH faster than previous iphones. Wondering if they upped the lightning port speed or are actually supporting the USB3 speeds (my pc has all usb3 ports so it is plugged to a 3)

Transferred 128 songs in about 20 seconds!